Pub Date : 2023-03-16DOI: 10.1080/17451000.2023.2206139
M. Hassoun, H. Moussa, G. Salhi, L. Benamar, N. Ben Ali, M. Kazzaz
ABSTRACT In the present paper, three algal species are recorded for the first time from Morocco: the two red algae Antithamnion villosum and Antithamnionella ternifolia and the green alga Lychaete rhodolithicola. Furthermore, two other red algae species are recorded for the first time from the Moroccan Atlantic coast and this part of the eastern Atlantic Ocean: Antithamnion amphigeneum and Antithamnionella boergesenii. Descriptions of these newly reported species are provided accompanied by photographs for each species. In addition, new observations and taxonomic remarks for some species are also provided. The green alga Lychaete rhodolithicola has a limited distribution in the North-eastern Atlantic Ocean of Europe, and the report of this species from Morocco extends the distribution of this species, because it is the first record of this species in Africa and outside Europe. This is one of the rare documentations with description and illustrations of L. rhodolithicola. The foliose species Grateloupia turuturu is studied in detail; it has been widely misidentified as G. doryphora. An examination of all specimens going under the name G. doryphora in the Moroccan herbaria has determined these specimens to be Grateloupia turuturu. An identification key for all Moroccan species of Antithamnion, Antithamnionella and Lychaete is presented.
{"title":"New records and observations of marine algae from Morocco (Eastern Atlantic Ocean)","authors":"M. Hassoun, H. Moussa, G. Salhi, L. Benamar, N. Ben Ali, M. Kazzaz","doi":"10.1080/17451000.2023.2206139","DOIUrl":"https://doi.org/10.1080/17451000.2023.2206139","url":null,"abstract":"ABSTRACT In the present paper, three algal species are recorded for the first time from Morocco: the two red algae Antithamnion villosum and Antithamnionella ternifolia and the green alga Lychaete rhodolithicola. Furthermore, two other red algae species are recorded for the first time from the Moroccan Atlantic coast and this part of the eastern Atlantic Ocean: Antithamnion amphigeneum and Antithamnionella boergesenii. Descriptions of these newly reported species are provided accompanied by photographs for each species. In addition, new observations and taxonomic remarks for some species are also provided. The green alga Lychaete rhodolithicola has a limited distribution in the North-eastern Atlantic Ocean of Europe, and the report of this species from Morocco extends the distribution of this species, because it is the first record of this species in Africa and outside Europe. This is one of the rare documentations with description and illustrations of L. rhodolithicola. The foliose species Grateloupia turuturu is studied in detail; it has been widely misidentified as G. doryphora. An examination of all specimens going under the name G. doryphora in the Moroccan herbaria has determined these specimens to be Grateloupia turuturu. An identification key for all Moroccan species of Antithamnion, Antithamnionella and Lychaete is presented.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"177 - 190"},"PeriodicalIF":1.1,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44533571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT Heavy metal in wastewater is a problem due to its unsafe nature to the surroundings. The adsorption characteristics of brown algae Sargassum myriocystum for Zn2+ ions uptake from metal solutions was investigated. Among various algal pretreatment HCl was found to be the best and was characterized with various methods for example BET, DSC-TGA, proximate and composition analysis, and Point of zero charges. Experiments were performed and adsorption reaches equilibrium at 60 min at pH 5.5 and adsorbate dose decreased when increasing metal concentration 50 g/l and 200 mg/l, respectively. Maximum adsorption efficiencies of Zn2+ ions take place at temperature 30°C and 0.5 g of algae biomass was found to be optimal, with an agitation speed of 150 rpm. Our results suggest that HCl-treated adsorbent could be used as a more effective adsorbent than untreated S. myriocystum for the uptake of Zn2+ from metal solution. Kinetics study was performed for evaluating the sorption kinetics and the obtained data fit best to the pseudo-second-order model for zinc ion when compared with all other given models. It was observed that the Freundlich isotherm showed a good fit to the equilibrium sorption data and shows the highest correlation coefficient values (R 2 > 0.90) for zinc, whereas in Van’t Hoff plots a positive value of ΔH°, a negative value of the free energy (ΔG°) and a positive value of ΔS o showed increased randomness at the solid/solution interface as well as the process being feasible and spontaneous by plotting 1/T vs ln Kc .
{"title":"Preparation and characterization of biosorbent Sargassum myriocystum for zinc removal","authors":"Jeba Sweetly Dharmadhas, Poornima Arumugam, Rajiv Periakaruppan","doi":"10.1080/17451000.2023.2193897","DOIUrl":"https://doi.org/10.1080/17451000.2023.2193897","url":null,"abstract":"ABSTRACT Heavy metal in wastewater is a problem due to its unsafe nature to the surroundings. The adsorption characteristics of brown algae Sargassum myriocystum for Zn2+ ions uptake from metal solutions was investigated. Among various algal pretreatment HCl was found to be the best and was characterized with various methods for example BET, DSC-TGA, proximate and composition analysis, and Point of zero charges. Experiments were performed and adsorption reaches equilibrium at 60 min at pH 5.5 and adsorbate dose decreased when increasing metal concentration 50 g/l and 200 mg/l, respectively. Maximum adsorption efficiencies of Zn2+ ions take place at temperature 30°C and 0.5 g of algae biomass was found to be optimal, with an agitation speed of 150 rpm. Our results suggest that HCl-treated adsorbent could be used as a more effective adsorbent than untreated S. myriocystum for the uptake of Zn2+ from metal solution. Kinetics study was performed for evaluating the sorption kinetics and the obtained data fit best to the pseudo-second-order model for zinc ion when compared with all other given models. It was observed that the Freundlich isotherm showed a good fit to the equilibrium sorption data and shows the highest correlation coefficient values (R 2 > 0.90) for zinc, whereas in Van’t Hoff plots a positive value of ΔH°, a negative value of the free energy (ΔG°) and a positive value of ΔS o showed increased randomness at the solid/solution interface as well as the process being feasible and spontaneous by plotting 1/T vs ln Kc .","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"121 - 131"},"PeriodicalIF":1.1,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45919627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-16DOI: 10.1080/17451000.2023.2206138
Saud AlBusaidi, K. Al-Hashmi
ABSTRACT Samples of mesozooplankton were collected and analysed from two contrasting coastal regions; Muscat (Sea of Oman) and Salalah (Arabian Sea). Copepods represented 41-44% of total biomass. Small species such as Temora turbinata, Oithona spp., Oncaea spp. and Microsetella spp. were abundant but their contribution to total biomass was small compared with the much rarer but larger species such as Eucalanidae, Calanoides natalis or Labidocera pavo. In Muscat, T. turbinata was particularly abundant, whereas C. natalis and Eucalanidae were more abundant in Salalah. Biomass in Muscat seems to be associated with a series of different species peaks showing no clear seasonality. However, biomass in Salalah followed a distinct seasonality with higher biomass during southwest monsoon., a seasonality pattern was observed with the meroplankton/holoplankton ratio in Salalah but not in Muscat. PERMANOVA analysis indicated that the communities structure showed geographic and seasonal differences. The effect of seasonality was particularly visible when the dataset included non-copepods, highlighting the role of this group in structuring mesozooplankton communities. Non-copepods such as chaetognaths and doliolids had a high biomass contribution to both geographic areas. normalized size spectra in both regions were similar and suggested that smaller species were underestimated Whereas, large species, especially chaetognaths, were over-represented.
{"title":"Seasonal biomass and composition of mesozooplankton communities in Sea of Oman and Arabian Sea","authors":"Saud AlBusaidi, K. Al-Hashmi","doi":"10.1080/17451000.2023.2206138","DOIUrl":"https://doi.org/10.1080/17451000.2023.2206138","url":null,"abstract":"ABSTRACT Samples of mesozooplankton were collected and analysed from two contrasting coastal regions; Muscat (Sea of Oman) and Salalah (Arabian Sea). Copepods represented 41-44% of total biomass. Small species such as Temora turbinata, Oithona spp., Oncaea spp. and Microsetella spp. were abundant but their contribution to total biomass was small compared with the much rarer but larger species such as Eucalanidae, Calanoides natalis or Labidocera pavo. In Muscat, T. turbinata was particularly abundant, whereas C. natalis and Eucalanidae were more abundant in Salalah. Biomass in Muscat seems to be associated with a series of different species peaks showing no clear seasonality. However, biomass in Salalah followed a distinct seasonality with higher biomass during southwest monsoon., a seasonality pattern was observed with the meroplankton/holoplankton ratio in Salalah but not in Muscat. PERMANOVA analysis indicated that the communities structure showed geographic and seasonal differences. The effect of seasonality was particularly visible when the dataset included non-copepods, highlighting the role of this group in structuring mesozooplankton communities. Non-copepods such as chaetognaths and doliolids had a high biomass contribution to both geographic areas. normalized size spectra in both regions were similar and suggested that smaller species were underestimated Whereas, large species, especially chaetognaths, were over-represented.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"94 - 107"},"PeriodicalIF":1.1,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48954319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-16DOI: 10.1080/17451000.2023.2205149
O. Volonterio, R. Ponce de León
ABSTRACT Three essential questions remain unresolved about the present Antarctic biota: its antiquity, origin, and ubiquity. Some benthic animals are capable of active self-dispersal following shallow corridors between islands. Identifying and characterizing the biota in such corridors is fundamental for biogeographic studies and the delimitation of priority sites to conserve biodiversity. The Scotia Arc provides an example of such passages, being a system of islands and underwater ridges connecting the Magellan Region to the Antarctic Peninsula and South Shetland Islands (Maritime Antarctic). Specimens of the free-living flatworm Orthoplana bregazzii Karling 1973 (Proseriata, Otoplanidae) were obtained in King George Island (South Shetland Islands). This is the first report of the family Otoplanidae from Antarctica, and the first rediscovery of the species 50 years after its original description. The present article provides a complete description of the Antarctic material of O. bregazzii, complements its original description, and provides an identification key to the species of Orthoplana. We analyze the distribution of the genus and species and argue that the range expansion reported here could be the result of a recent, successful colonization event. This work, therefore, gives insights into the systematics and biogeography of one of the lesser-known groups in the Antarctic fauna.
{"title":"Systematic and biogeographical aspects of the first Antarctic discovery of Orthoplana bregazzii Karling, 1973 (Proseriata, Otoplanidae)","authors":"O. Volonterio, R. Ponce de León","doi":"10.1080/17451000.2023.2205149","DOIUrl":"https://doi.org/10.1080/17451000.2023.2205149","url":null,"abstract":"ABSTRACT Three essential questions remain unresolved about the present Antarctic biota: its antiquity, origin, and ubiquity. Some benthic animals are capable of active self-dispersal following shallow corridors between islands. Identifying and characterizing the biota in such corridors is fundamental for biogeographic studies and the delimitation of priority sites to conserve biodiversity. The Scotia Arc provides an example of such passages, being a system of islands and underwater ridges connecting the Magellan Region to the Antarctic Peninsula and South Shetland Islands (Maritime Antarctic). Specimens of the free-living flatworm Orthoplana bregazzii Karling 1973 (Proseriata, Otoplanidae) were obtained in King George Island (South Shetland Islands). This is the first report of the family Otoplanidae from Antarctica, and the first rediscovery of the species 50 years after its original description. The present article provides a complete description of the Antarctic material of O. bregazzii, complements its original description, and provides an identification key to the species of Orthoplana. We analyze the distribution of the genus and species and argue that the range expansion reported here could be the result of a recent, successful colonization event. This work, therefore, gives insights into the systematics and biogeography of one of the lesser-known groups in the Antarctic fauna.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"154 - 164"},"PeriodicalIF":1.1,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41557121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-16DOI: 10.1080/17451000.2023.2224967
L. Buhl‐Mortensen, T. H. Thangstad, G. Søvik, H. Wehde
ABSTRACT This study presents the distribution and abundance of key species of the vulnerable marine ecosystems (VMEs) ‘Coral gardens’ and ‘Sea pen and burrowing megafauna’ in Skagerrak and the Norwegian trench. It is based on 543 bycatches from 2017–2021, and 35 ROV dives from 2016-2017. Bycatches were used to indicate distribution and relative abundance of the VME key species while ROV observations provided information on colony densities, associated fauna and damages. Four sea pen species were recorded. Funiculina quadrangularis and Kophobelemnon stelliferum were widely distributed and most abundant below 200 meters. The few records of Pennatula phosphorea were mainly from shallower than 100 meters, and the rare Balticina finmarchica primarily occurred below 200 meters. The ROV videos confirmed the pattern from the bycatches, however, colony densities were much higher, and the sea pen Virgularia mirabilis recorded in high abundances was not present in bycatches. The coral garden key species Isidella lofotensis, endemic to Norway, had a restricted area of occurrence confirmed by both methodologies. The restricted distribution makes it particularly vulnerable. Fishing activities overlap with the VMEs distribution and the observations of sea pen skeletons and the coral predatory anemone Ptychodactis patula are indicative of pressure from bottom trawl fishing. KEY POLICY HIGHLIGHTS ‘Sea pen and burrowing megafauna’ is a widely distributed VME in Skagerrak and the Norwegian trench, an area with intense bottom trawling. Recorded sea pen species show different distribution patterns, and vulnerability should be evaluated at species level. There is an immediate need for protection of the VME ‘Coral Garden’ represented by the bamboo coral Isidella lofotensis and mapping and monitoring is necessary to evaluate ecological status. Trawl bycatches provide valuable information on VMEs, but the precision on position and abundance of colonies is low compared with visual mapping, and trawling is a threat to the VMEs.
{"title":"Sea pens and bamboo corals in Skagerrak and the Norwegian trench","authors":"L. Buhl‐Mortensen, T. H. Thangstad, G. Søvik, H. Wehde","doi":"10.1080/17451000.2023.2224967","DOIUrl":"https://doi.org/10.1080/17451000.2023.2224967","url":null,"abstract":"ABSTRACT This study presents the distribution and abundance of key species of the vulnerable marine ecosystems (VMEs) ‘Coral gardens’ and ‘Sea pen and burrowing megafauna’ in Skagerrak and the Norwegian trench. It is based on 543 bycatches from 2017–2021, and 35 ROV dives from 2016-2017. Bycatches were used to indicate distribution and relative abundance of the VME key species while ROV observations provided information on colony densities, associated fauna and damages. Four sea pen species were recorded. Funiculina quadrangularis and Kophobelemnon stelliferum were widely distributed and most abundant below 200 meters. The few records of Pennatula phosphorea were mainly from shallower than 100 meters, and the rare Balticina finmarchica primarily occurred below 200 meters. The ROV videos confirmed the pattern from the bycatches, however, colony densities were much higher, and the sea pen Virgularia mirabilis recorded in high abundances was not present in bycatches. The coral garden key species Isidella lofotensis, endemic to Norway, had a restricted area of occurrence confirmed by both methodologies. The restricted distribution makes it particularly vulnerable. Fishing activities overlap with the VMEs distribution and the observations of sea pen skeletons and the coral predatory anemone Ptychodactis patula are indicative of pressure from bottom trawl fishing. KEY POLICY HIGHLIGHTS ‘Sea pen and burrowing megafauna’ is a widely distributed VME in Skagerrak and the Norwegian trench, an area with intense bottom trawling. Recorded sea pen species show different distribution patterns, and vulnerability should be evaluated at species level. There is an immediate need for protection of the VME ‘Coral Garden’ represented by the bamboo coral Isidella lofotensis and mapping and monitoring is necessary to evaluate ecological status. Trawl bycatches provide valuable information on VMEs, but the precision on position and abundance of colonies is low compared with visual mapping, and trawling is a threat to the VMEs.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"191 - 206"},"PeriodicalIF":1.1,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48175500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-16DOI: 10.1080/17451000.2023.2193898
Celia Delgado-Serrano, F. Tuya
ABSTRACT Seagrasses create three-dimensional habitats (i.e. meadows) of paramount conservation relevance, which are distributed across large spatial scales, under varying environmental conditions. Cymodocea nodosa (Ucria) Ascherson is a warm-temperate seagrass, distributed along the entire Mediterranean and the adjacent Atlantic Ocean. As with many seagrasses, this species shows an annual (seasonal) pattern in canopy vitality, with maximums in leaf canopy structure (e.g. shoot density and leaf length) in spring-summer, while canopy leaf structure is reduced in winter. Since this seagrass experiences varying environmental (e.g. thermal) scenarios across its distribution range, we tested whether annual (seasonal) variation in the leaf canopy structure, in terms of shoot density, leaf length and above-ground biomass, are modulated by local environmental (here, thermal) variation. Annual variation in the shoot density of C. nodosa across its distribution range was not predicted by local environmental regimes (thermal regimes, in terms of variation in sea surface temperature, SST). However, annual variation in leaf length and biomass was significantly predicted by variation in local thermal regimes. A larger annual environmental variation, here in terms of SST, was connected with a more marked seasonal variation in leaf canopy structure, both in terms of leaf length and biomass. If a major effect of climate change is an increase in environmental variation, an increase in the annual leaf canopy variation for C. nodosa meadows along its distribution range might be expected.
{"title":"Annual variation in leaf canopy across a seagrass distribution range is modulated by local environmental variation","authors":"Celia Delgado-Serrano, F. Tuya","doi":"10.1080/17451000.2023.2193898","DOIUrl":"https://doi.org/10.1080/17451000.2023.2193898","url":null,"abstract":"ABSTRACT Seagrasses create three-dimensional habitats (i.e. meadows) of paramount conservation relevance, which are distributed across large spatial scales, under varying environmental conditions. Cymodocea nodosa (Ucria) Ascherson is a warm-temperate seagrass, distributed along the entire Mediterranean and the adjacent Atlantic Ocean. As with many seagrasses, this species shows an annual (seasonal) pattern in canopy vitality, with maximums in leaf canopy structure (e.g. shoot density and leaf length) in spring-summer, while canopy leaf structure is reduced in winter. Since this seagrass experiences varying environmental (e.g. thermal) scenarios across its distribution range, we tested whether annual (seasonal) variation in the leaf canopy structure, in terms of shoot density, leaf length and above-ground biomass, are modulated by local environmental (here, thermal) variation. Annual variation in the shoot density of C. nodosa across its distribution range was not predicted by local environmental regimes (thermal regimes, in terms of variation in sea surface temperature, SST). However, annual variation in leaf length and biomass was significantly predicted by variation in local thermal regimes. A larger annual environmental variation, here in terms of SST, was connected with a more marked seasonal variation in leaf canopy structure, both in terms of leaf length and biomass. If a major effect of climate change is an increase in environmental variation, an increase in the annual leaf canopy variation for C. nodosa meadows along its distribution range might be expected.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"132 - 140"},"PeriodicalIF":1.1,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46604726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-02DOI: 10.1080/17451000.2023.2198241
Sheena Jose, S. Bharathi, A. Damodhar, K. Jayachandran, T. A. Kumar, Kuldeep Kumar Lal
ABSTRACT The reef-associated palaemonid shrimp fauna of Indian waters, especially in island ecosystems, is one of the least studied. During explorations at Lakshadweep Islands, Cuapetes elegans (Paulson 1875), C. grandis (Stimpson 1857) and a new species, Cuapetes purushothamani sp. nov., were recorded and illustrated based on the specimens collected from dead coral and rocky shore regions of eastern lagoon of Agatti Island (0.5–1.0 m), Lakshadweep, India. The new species shows close relation with C. elegans, possessing distinctive characteristics as indicated: rostrum extends as far as antennal scale, arrangement of ventral teeth below the wide edentulous dorsal part of rostrum, long dorsal spines of telson, a fewer number of segments in antennal flagellum, fingers of first chelated leg slightly longer than palm, chela of second cheliped longer than combined length of merus and carpus with inflated palm. In addition, the partial sequences of mitochondrial genes cytochrome c oxidase I (COI), 16S and nuclear Histone 3 (H3) gene were generated and compared with other available species of Cuapetes. The phylogenetic analyses strongly supported our new discovery, Cuapetes purushothamani sp. nov., which possesses a close relationship with C. elegans by having high interspecific genetic divergences (COI: 19.2–19.9%; 16S: 12–12.8%; H3: 3.1–3.9%). http://zoobank.org/urn:lsid:zoobank.org:pub:1B5C9228-9D9F-430E-BF11-C6DC7510DF1B
{"title":"Reef-associated palaemonid shrimp fauna of Lakshadweep islands: special focus on Cuapetes Clark, 1919 (Decapoda; Caridea) with a description of new species and phylogenetic notes","authors":"Sheena Jose, S. Bharathi, A. Damodhar, K. Jayachandran, T. A. Kumar, Kuldeep Kumar Lal","doi":"10.1080/17451000.2023.2198241","DOIUrl":"https://doi.org/10.1080/17451000.2023.2198241","url":null,"abstract":"ABSTRACT The reef-associated palaemonid shrimp fauna of Indian waters, especially in island ecosystems, is one of the least studied. During explorations at Lakshadweep Islands, Cuapetes elegans (Paulson 1875), C. grandis (Stimpson 1857) and a new species, Cuapetes purushothamani sp. nov., were recorded and illustrated based on the specimens collected from dead coral and rocky shore regions of eastern lagoon of Agatti Island (0.5–1.0 m), Lakshadweep, India. The new species shows close relation with C. elegans, possessing distinctive characteristics as indicated: rostrum extends as far as antennal scale, arrangement of ventral teeth below the wide edentulous dorsal part of rostrum, long dorsal spines of telson, a fewer number of segments in antennal flagellum, fingers of first chelated leg slightly longer than palm, chela of second cheliped longer than combined length of merus and carpus with inflated palm. In addition, the partial sequences of mitochondrial genes cytochrome c oxidase I (COI), 16S and nuclear Histone 3 (H3) gene were generated and compared with other available species of Cuapetes. The phylogenetic analyses strongly supported our new discovery, Cuapetes purushothamani sp. nov., which possesses a close relationship with C. elegans by having high interspecific genetic divergences (COI: 19.2–19.9%; 16S: 12–12.8%; H3: 3.1–3.9%). http://zoobank.org/urn:lsid:zoobank.org:pub:1B5C9228-9D9F-430E-BF11-C6DC7510DF1B","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"25 - 47"},"PeriodicalIF":1.1,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48122341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-02DOI: 10.1080/17451000.2023.2198243
Deniz Eşkinat, A. Gücü, Meltem Ok
ABSTRACT The striped piggy, Pomadasys stridens (Forsskål, 1775), is one of the successfully colonized Lessepsian immigrants entering the Mediterranean through the Suez Canal. This study was carried out to understand to what extent the reproduction strategy adopted by this species had played a role in its successful establishment. The study is based on samples collected during the monthly trawl surveys conducted between January 2017 to November 2020 in the Northeast Mediterranean. The annual gonadal development cycle was estimated by observing the Gonadosomatic Index changes. Seasonal patterns in energy intake and allocation were acquired from Hepatosomatic, Digestosomatic, and Relative Body Condition indices. The results indicated that the species has prolonged gonadal development periods, during which spawning occurs twice, in early summer and at the onset of the winter. A comparison of all indices involved indicated that the species feeds and develops gonads at the same time before summer spawning, feeds heavily and stores energy during the warmest period, and uses the stored energy in the winter spawning. As these features do not differ much from their congenerics inhabiting the geography they originated from, it is suggested that it was not the ecological plasticity of the species that is the basis of their success but the reproductive traits they have fitted well to the Mediterranean Ecosystem.
{"title":"Annual reproductive cycle of a successful Lessepsian immigrant in the Eastern Mediterranean Sea, Pomadasys stridens (Forsskål, 1775) (Family: Haemulidae)","authors":"Deniz Eşkinat, A. Gücü, Meltem Ok","doi":"10.1080/17451000.2023.2198243","DOIUrl":"https://doi.org/10.1080/17451000.2023.2198243","url":null,"abstract":"ABSTRACT The striped piggy, Pomadasys stridens (Forsskål, 1775), is one of the successfully colonized Lessepsian immigrants entering the Mediterranean through the Suez Canal. This study was carried out to understand to what extent the reproduction strategy adopted by this species had played a role in its successful establishment. The study is based on samples collected during the monthly trawl surveys conducted between January 2017 to November 2020 in the Northeast Mediterranean. The annual gonadal development cycle was estimated by observing the Gonadosomatic Index changes. Seasonal patterns in energy intake and allocation were acquired from Hepatosomatic, Digestosomatic, and Relative Body Condition indices. The results indicated that the species has prolonged gonadal development periods, during which spawning occurs twice, in early summer and at the onset of the winter. A comparison of all indices involved indicated that the species feeds and develops gonads at the same time before summer spawning, feeds heavily and stores energy during the warmest period, and uses the stored energy in the winter spawning. As these features do not differ much from their congenerics inhabiting the geography they originated from, it is suggested that it was not the ecological plasticity of the species that is the basis of their success but the reproductive traits they have fitted well to the Mediterranean Ecosystem.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"13 - 24"},"PeriodicalIF":1.1,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46221835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-02DOI: 10.1080/17451000.2023.2194059
L. F. Andrade, A. R. Senna, J. F. Souza-Filho
ABSTRACT Three new species of Harpinia are described from north-eastern Brazil, documenting the first record of the genus from the southern hemisphere. The material examined was collected using a Mini Box Corer within the project ‘Avaliação da Biota Bentônica e Planctônica da Bacia Potiguar e Ceará’ in Potiguar Basin, Rio Grande do Norte state, from depths ranging from 283–998 m. Harpinia bidens sp. nov. is characterized by the following: head with dorsal keel; antenna 2 peduncle article 1 weakly ensiform; gnathopod 2 palm defined by a large excavation producing a spine; epimeral plate 1 posteroventral corner as a short blunt lobe; and epimeral plate 3 with an oblique facial row of setae, posteroventral corner as a large spine. Harpinia kingae sp. nov. can be diagnosed by the following: antenna 2 peduncle article 1 ensiform; gnathopod 1 palm defined by a u-shaped excavation; coxa 7 posterior margin crenulate; epimeral plate 3 posteroventral corner as a spine; and uropod 2 outer ramus with subapical nail. Finally, H. longidactyla sp. nov. has the following diagnostic characters: head with lower lateral blunt projection; antenna 2 article 1 not ensiform; gnathopods 1–2 palm defined by a sinuous excavation; pereopod 6 dactylus longer than propodus; and epimeral plate 3 posteroventrally rounded. Also, a discussion about the genus and an identification key to world species of Harpinia are provided.
在巴西东北部发现了3个新种，首次记录了该属在南半球的分布。所检查的材料是在“avalia o da Biota Bentônica e Planctônica da Bacia Potiguar e ceear”项目中使用Mini Box cover收集的，该项目位于里约热内卢Grande do Norte州的Potiguar盆地，深度为283-998米。双翅龙的特征是:头部有背龙骨;天线2花梗条1弱剑形;颚足目动物2掌，由一个产生脊椎的大挖掘定义;外板1后腹角作为一短钝的裂片;而外板3面有一排斜刚毛，后腹角为大棘。根据以下特征可诊断为:触角2花序梗条1剑形;颚足目1手掌由u形的挖掘定义;髋7后缘具小圆齿;外板3后腹侧角为棘;尾足2外支有近根尖甲。最后，长趾棘猴具有以下诊断特征:头部下侧钝突;天线2条1不均匀;颚足目动物1-2掌，由弯曲的凹陷界定;准足目6趾足目比原足目长;外板3后腹圆形。文中还对该属进行了讨论，并给出了世界种的鉴定关键字。
{"title":"First record of the genus Harpinia Boeck, 1876 (Amphipoda: Phoxocephalidae: Harpiniinae) from the southern hemisphere, with description of three new species","authors":"L. F. Andrade, A. R. Senna, J. F. Souza-Filho","doi":"10.1080/17451000.2023.2194059","DOIUrl":"https://doi.org/10.1080/17451000.2023.2194059","url":null,"abstract":"ABSTRACT Three new species of Harpinia are described from north-eastern Brazil, documenting the first record of the genus from the southern hemisphere. The material examined was collected using a Mini Box Corer within the project ‘Avaliação da Biota Bentônica e Planctônica da Bacia Potiguar e Ceará’ in Potiguar Basin, Rio Grande do Norte state, from depths ranging from 283–998 m. Harpinia bidens sp. nov. is characterized by the following: head with dorsal keel; antenna 2 peduncle article 1 weakly ensiform; gnathopod 2 palm defined by a large excavation producing a spine; epimeral plate 1 posteroventral corner as a short blunt lobe; and epimeral plate 3 with an oblique facial row of setae, posteroventral corner as a large spine. Harpinia kingae sp. nov. can be diagnosed by the following: antenna 2 peduncle article 1 ensiform; gnathopod 1 palm defined by a u-shaped excavation; coxa 7 posterior margin crenulate; epimeral plate 3 posteroventral corner as a spine; and uropod 2 outer ramus with subapical nail. Finally, H. longidactyla sp. nov. has the following diagnostic characters: head with lower lateral blunt projection; antenna 2 article 1 not ensiform; gnathopods 1–2 palm defined by a sinuous excavation; pereopod 6 dactylus longer than propodus; and epimeral plate 3 posteroventrally rounded. Also, a discussion about the genus and an identification key to world species of Harpinia are provided.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"59 - 80"},"PeriodicalIF":1.1,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46841257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-02DOI: 10.1080/17451000.2023.2185639
Bahtiar, M. F. Purnama, M. Kasim, E. Ishak
ABSTRACT Mangrove clams are found in the soft substrates of the mangrove forest, where they reproductively adjust to the conditions in the aquatic environment. This study aimed to determine the reproductive biology pattern, such as sex ratio, gonad maturity level, gonadosomatic index, fecundity and size of the first maturity of mangrove clams. The samples included 80 ind./month collected manually from the mangrove ecosystem for one year. The reproductive biology patterns were calculated using standard formulas, each analysed using the χ2 test, semi-quantitative descriptive evaluation and non-linear regression. The results showed that more males than females were collected, accounting for 80.0–96.5% and 3.4–20.0%, respectively. Furthermore, both sexes’ gonad maturity developments coincided. The mangrove clam’s mature gonads are discoverable all year by observing the gonadosomatic index IV and spawning monthly occurrence. Their maturity peaked (levels III and IV) in February–April, indicated by a high index value ranging from 3.9–18.2 and 4.3–21.9 for the male and female mangrove shells, respectively. The male clams also had smaller sizes at maturity than females at 3.0 and 5.2 cm lengths, respectively. The food (organic sediment) availability was an essential environmental parameter in developing gonadal maturity.
{"title":"Reproductive biology of mangrove clams Geloina expansa (Mousson, 1849) from mangrove at Kendari Bay, Southeast Sulawesi, Indonesia","authors":"Bahtiar, M. F. Purnama, M. Kasim, E. Ishak","doi":"10.1080/17451000.2023.2185639","DOIUrl":"https://doi.org/10.1080/17451000.2023.2185639","url":null,"abstract":"ABSTRACT Mangrove clams are found in the soft substrates of the mangrove forest, where they reproductively adjust to the conditions in the aquatic environment. This study aimed to determine the reproductive biology pattern, such as sex ratio, gonad maturity level, gonadosomatic index, fecundity and size of the first maturity of mangrove clams. The samples included 80 ind./month collected manually from the mangrove ecosystem for one year. The reproductive biology patterns were calculated using standard formulas, each analysed using the χ2 test, semi-quantitative descriptive evaluation and non-linear regression. The results showed that more males than females were collected, accounting for 80.0–96.5% and 3.4–20.0%, respectively. Furthermore, both sexes’ gonad maturity developments coincided. The mangrove clam’s mature gonads are discoverable all year by observing the gonadosomatic index IV and spawning monthly occurrence. Their maturity peaked (levels III and IV) in February–April, indicated by a high index value ranging from 3.9–18.2 and 4.3–21.9 for the male and female mangrove shells, respectively. The male clams also had smaller sizes at maturity than females at 3.0 and 5.2 cm lengths, respectively. The food (organic sediment) availability was an essential environmental parameter in developing gonadal maturity.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"19 1","pages":"48 - 58"},"PeriodicalIF":1.1,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49647920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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