Pub Date : 2021-06-11DOI: 10.3989/SCIMAR.05078.012
J. Garcês, P. Pousão‐Ferreira
There is growing demand for the territorial tube-building genus Marphysa (Eunicidae: Polychaete), commonly known in Portugal as “goose”, for use as fishing bait, and it is being harvested all around the world for that purpose. Effects of intraspecific density on juvenile growth were studied over a four-month period in laboratory facilities. Three polychaete densities (low, 50 worms; medium, 150 worms; and high, 250 worms) were used in a 0.25 m aquarium containing sandy sediment and recirculating water. Total length, dry weight and number of segments were recorded for 60% of the initial population. All polychaetes were also counted to determine mortality rate and territorial behaviour through the existence of body lesions and broken and regenerating posterior segments. The results obtained in this study showed that density had a significant effect (p<0.001) on growth rates in any of the densities studied and that growth was significantly higher at lower densities (p<0.001). For all density levels, estimated daily growth was higher in the first month, decreasing progressively over time. The high aggressiveness and territorial behaviour of Marphysa “sp.” juveniles, well evidenced by the highest mortality (35%) under high density and by the presence of worms with lesions under low density (30%) observed in the first month, suggests that territoriality is probably the main factor involved in the organization and spatial arrangements of individuals within a population. Marphysa juveniles probably compete for burrow space. The results reveal that Marphysa juveniles have a very territorial and aggressive behaviour that should be considered if the species is used for aquaculture production. Additional studies are required to determine the density effects for different developmental stages.
{"title":"Intraspecific density effect on growth of Marphysa “sp.” Juveniles","authors":"J. Garcês, P. Pousão‐Ferreira","doi":"10.3989/SCIMAR.05078.012","DOIUrl":"https://doi.org/10.3989/SCIMAR.05078.012","url":null,"abstract":"There is growing demand for the territorial tube-building genus Marphysa (Eunicidae: Polychaete), commonly known in Portugal as “goose”, for use as fishing bait, and it is being harvested all around the world for that purpose. Effects of intraspecific density on juvenile growth were studied over a four-month period in laboratory facilities. Three polychaete densities (low, 50 worms; medium, 150 worms; and high, 250 worms) were used in a 0.25 m aquarium containing sandy sediment and recirculating water. Total length, dry weight and number of segments were recorded for 60% of the initial population. All polychaetes were also counted to determine mortality rate and territorial behaviour through the existence of body lesions and broken and regenerating posterior segments. The results obtained in this study showed that density had a significant effect (p<0.001) on growth rates in any of the densities studied and that growth was significantly higher at lower densities (p<0.001). For all density levels, estimated daily growth was higher in the first month, decreasing progressively over time. The high aggressiveness and territorial behaviour of Marphysa “sp.” juveniles, well evidenced by the highest mortality (35%) under high density and by the presence of worms with lesions under low density (30%) observed in the first month, suggests that territoriality is probably the main factor involved in the organization and spatial arrangements of individuals within a population. Marphysa juveniles probably compete for burrow space. The results reveal that Marphysa juveniles have a very territorial and aggressive behaviour that should be considered if the species is used for aquaculture production. Additional studies are required to determine the density effects for different developmental stages.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":"85 1","pages":"137-144"},"PeriodicalIF":1.4,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48145011","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 : 2021-06-11DOI: 10.3989/SCIMAR.05131.011
M. Arroyo, F. Ruiz, M. L. González-Regalado, J. Rodríguez Vidal, L. Cáceres, M. Olías, J. M. Campos, Lucía Fernández, M. Abad, T. Izquierdo, P. Gómez, A. Toscano, Verónica Romero, Gabriel Gómez
1 Departamento de Ciencias de la Tierra, Universidad de Huelva, 21071 Huelva, Spain. (MA) E-mail: mararser@gmail.com. ORCID iD: https://orcid.org/0000-0002-6693-598X (FR) (Corresponding author) E-mail: ruizmu@uhu.es. ORCID iD: https://orcid.org/0000-0001-8581-6823 (MLG-R) E-mail: montero@uhu.es. ORCID iD: https://orcid.org/0000-0002-2626-9142 (JRV) E-mail: jrvidal@dgeo.uhu.es: ORCID iD: https://orcid.org/0000-0002-9475-3307 (LMC) E-mail: mcaceres@uhu.es. ORCID iD: https://orcid.org/0000-0002-1381-2476 (MO): E-mail: manuel.olias@dgyp.uhu.es. ORCID iD: https://orcid.org/0000-0001-5394-3449 (PG) E-mail: paula.gomezgutierrez@hotmail.com. ORCID iD: https://orcid.org/0000-0003-3630-042X (AT) E-mail: antonio.toscano@dgyp.uhu.es. ORCID iD: https://orcid.org/0000-0003-2144-5714 (VR) E-mail: vero.ra93@gmail.com. ORCID iD: https://orcid.org/0000-0002-6879-0243 (GG) E-mail: ggomezalvarez@yahoo.es. ORCID iD: https://orcid.org/0000-0002-1641-0966 2 Centro de Investigación en Patrimonio Histórico, Cultural y Natural (CIPHCN), Universidad de Huelva, 21071 Huelva, Spain. 3 Departamento de Historia, Geografía y Antropología, Universidad de Huelva, 21071 Huelva, Spain. (JMC) E-mail: campos@uhu.es. ORCID iD: https://orcid.org/0000-0002-4930-2515 (LF) E-mail: lucia.fernandez@dhga.uhu.es. ORCID iD: https://orcid.org/0000-0002-8586-497X 4 Departamento de Biología y Geología, Física y Química Inorgánica, ESCET, Universidad Rey Juan Carlos, c/ Tulipán s/n, 28933 Móstoles, Spain. (MA) E-mail: manuel.abad@urjc.es. ORCID iD: https://orcid.org/0000-0003-1930-2650 5 Instituto de Investigaciones Científicas y Tecnológicas de la Universidad de Atacama (IDICTEC-UDA), Avenida Copayapu 485, Copiapó, Chile. (TA) E-mail: tatiana.izquierdo@uda.cl. ORCID iD: https://orcid.org/0000-0002-3805-2020
{"title":"Natural and anthropic pollution episodes during the Late Holocene evolution of the Tinto River estuary (SW Spain)","authors":"M. Arroyo, F. Ruiz, M. L. González-Regalado, J. Rodríguez Vidal, L. Cáceres, M. Olías, J. M. Campos, Lucía Fernández, M. Abad, T. Izquierdo, P. Gómez, A. Toscano, Verónica Romero, Gabriel Gómez","doi":"10.3989/SCIMAR.05131.011","DOIUrl":"https://doi.org/10.3989/SCIMAR.05131.011","url":null,"abstract":"1 Departamento de Ciencias de la Tierra, Universidad de Huelva, 21071 Huelva, Spain. (MA) E-mail: mararser@gmail.com. ORCID iD: https://orcid.org/0000-0002-6693-598X (FR) (Corresponding author) E-mail: ruizmu@uhu.es. ORCID iD: https://orcid.org/0000-0001-8581-6823 (MLG-R) E-mail: montero@uhu.es. ORCID iD: https://orcid.org/0000-0002-2626-9142 (JRV) E-mail: jrvidal@dgeo.uhu.es: ORCID iD: https://orcid.org/0000-0002-9475-3307 (LMC) E-mail: mcaceres@uhu.es. ORCID iD: https://orcid.org/0000-0002-1381-2476 (MO): E-mail: manuel.olias@dgyp.uhu.es. ORCID iD: https://orcid.org/0000-0001-5394-3449 (PG) E-mail: paula.gomezgutierrez@hotmail.com. ORCID iD: https://orcid.org/0000-0003-3630-042X (AT) E-mail: antonio.toscano@dgyp.uhu.es. ORCID iD: https://orcid.org/0000-0003-2144-5714 (VR) E-mail: vero.ra93@gmail.com. ORCID iD: https://orcid.org/0000-0002-6879-0243 (GG) E-mail: ggomezalvarez@yahoo.es. ORCID iD: https://orcid.org/0000-0002-1641-0966 2 Centro de Investigación en Patrimonio Histórico, Cultural y Natural (CIPHCN), Universidad de Huelva, 21071 Huelva, Spain. 3 Departamento de Historia, Geografía y Antropología, Universidad de Huelva, 21071 Huelva, Spain. (JMC) E-mail: campos@uhu.es. ORCID iD: https://orcid.org/0000-0002-4930-2515 (LF) E-mail: lucia.fernandez@dhga.uhu.es. ORCID iD: https://orcid.org/0000-0002-8586-497X 4 Departamento de Biología y Geología, Física y Química Inorgánica, ESCET, Universidad Rey Juan Carlos, c/ Tulipán s/n, 28933 Móstoles, Spain. (MA) E-mail: manuel.abad@urjc.es. ORCID iD: https://orcid.org/0000-0003-1930-2650 5 Instituto de Investigaciones Científicas y Tecnológicas de la Universidad de Atacama (IDICTEC-UDA), Avenida Copayapu 485, Copiapó, Chile. (TA) E-mail: tatiana.izquierdo@uda.cl. ORCID iD: https://orcid.org/0000-0002-3805-2020","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":"85 1","pages":"113-123"},"PeriodicalIF":1.4,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42736584","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}
{"title":"Assessment of trace element accumulation on the Tunisian coasts using biochemical biomarkers in Perinereis cultrifera","authors":"M. Bouhedi, M. Antit, M. Chaibi, H. Perrein‐Ettajani, P. Gillet, A. Azzouna","doi":"10.3989/SCIMAR.05099.009","DOIUrl":"https://doi.org/10.3989/SCIMAR.05099.009","url":null,"abstract":"1 Laboratory of Ecology, Biology and Physiology of Aquatic Organisms, Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092 Tunis, Tunisia. (MB) (Corresponding author) E-mail: marwa.bouhedi@fst.utm.tn. ORCID iD: https://orcid.org/0000-0002-2705-7483 (MA) E-mail: antit_mouna@yahoo.fr. ORCID iD: https://orcid.org/0000-0002-0420-7119 (MC) E-mail: Marwachaibi89@gmail.com. ORCID iD: https://orcid.org/0000-0001-5958-4213 (AA) E-mail: atf.azzouna@fst.utm.tn. ORCID iD: https://orcid.org/0000-0002-5606-5239 2 Mer Molécules Santé, Department of Biology Environment, Faculty of Sciences, UCO Angers, France. (HP-E) E-mail: hperrein@uco.fr. ORCID iD: https://orcid.org/0000-0002-4195-3137 (PG) E-mail: pgillet@uco.fr. ORCID iD: https://orcid.org/0000-0002-7183-9685","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":"85 1","pages":"91-102"},"PeriodicalIF":1.4,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47711217","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 : 2021-06-11DOI: 10.3989/SCIMAR.05146.013
Ibis Tarini López-Jiménez, L. I. Quan-Young, L. Florez-Leiva
1 Ocean, Climate and Environment Research Group (OCA), Corporación Académica Ambiental, Universidad de Antioquia, calle 67 No. 53-108, 050010 Medellín, Colombia. (ITL-J) (Corresponding author): E-mail: itlopezj@gmail.com. ORCID iD: https://orcid.org/0000-0001-7392-2944 (LF-L) E-mail: lennin.fl@gmail.com. ORCID iD: https://orcid.org/0000-0001-7280-8517 2 Grupo Biología CES, Facultad de Ciencias y Biotechnología, Universidad CES, Calle 10A No. 22-04, 050021 Medellín, Colombia. (LIQ-Y) E-mail: lquan@ces.edu.co. ORCID iD: https://orcid.org/0000-0002-2393-7328
1 Ocean，Climate and Environment Research Group，Environmental Academical Corporation，Antioquia大学，67街53-108号，050010麦德林，哥伦比亚。（ITL-J）（对应作者）：电子邮件：itlopezj@gmail.com.Orcid ID：https://orcid.org/0000-0001-7392-2944（LF-L）电子邮件：lennin.fl@gmail.com.Orcid ID：https://orcid.org/0000-0001-7280-85172 CES生物学小组，CES大学科学与生物技术学院，Calle 10A No.22-04，050021 Medellin，哥伦比亚。（LIQ-Y）电子邮件：lquan@ces.edu.co.Orcid ID：https://orcid.org/0000-0002-2393-7328
{"title":"Effect of terrigenous sediments on macroalgae functional-form groups of coral reefs in Capurganá, Colombian Caribbean","authors":"Ibis Tarini López-Jiménez, L. I. Quan-Young, L. Florez-Leiva","doi":"10.3989/SCIMAR.05146.013","DOIUrl":"https://doi.org/10.3989/SCIMAR.05146.013","url":null,"abstract":"1 Ocean, Climate and Environment Research Group (OCA), Corporación Académica Ambiental, Universidad de Antioquia, calle 67 No. 53-108, 050010 Medellín, Colombia. (ITL-J) (Corresponding author): E-mail: itlopezj@gmail.com. ORCID iD: https://orcid.org/0000-0001-7392-2944 (LF-L) E-mail: lennin.fl@gmail.com. ORCID iD: https://orcid.org/0000-0001-7280-8517 2 Grupo Biología CES, Facultad de Ciencias y Biotechnología, Universidad CES, Calle 10A No. 22-04, 050021 Medellín, Colombia. (LIQ-Y) E-mail: lquan@ces.edu.co. ORCID iD: https://orcid.org/0000-0002-2393-7328","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":"85 1","pages":"125-135"},"PeriodicalIF":1.4,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45415873","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 : 2021-06-11DOI: 10.3989/SCIMAR.05106.007
Enric Real, A. Bernal, B. Morales-Nin, B. Molí, Itziar Álvarez, M. Pilar Olivar
The age and growth patterns of the mesopelagic fish Ceratoscopelus maderensis (family Myctophidae) of the western Mediterranean Sea were described throughout its entire life cycle (from larvae to adult stages) using the sagittae otoliths of 59 individuals collected in December 2009. Three characteristic zones were identified along the cross-section of the sagittae (larval, metamorphic and juvenile-adult zones). Assuming growth rings as daily increments, the age of the analysed individuals (from 3.5 to 64 mm standard length [SL]) would range from 7 to 332 days. The relationship between the number of increments and the fish SL was fitted to a von Bertalanffy growth model (SL=70.5899A~(1–exp(–0.0501(t+2.6705))). The growth pattern of C. maderensis in the western Mediterranean Sea was similar to that reported for this species in the northeast Atlantic Ocean. Though from a body size of 40-45 mm SL, growth rates declined more slowly in individuals from the western Mediterranean Sea, growth differences between these individuals and those from the northeast Atlantic Ocean were not statistically significant. This study provides new insights into the age and growth patterns of one of the most abundant mesopelagic fish species in the Mediterranean Sea that have clear implications for the study and management of marine ecosystems.
{"title":"Growth patterns of the lanternfish Ceratoscopelus maderensis in the western Mediterranean Sea","authors":"Enric Real, A. Bernal, B. Morales-Nin, B. Molí, Itziar Álvarez, M. Pilar Olivar","doi":"10.3989/SCIMAR.05106.007","DOIUrl":"https://doi.org/10.3989/SCIMAR.05106.007","url":null,"abstract":"The age and growth patterns of the mesopelagic fish Ceratoscopelus maderensis (family Myctophidae) of the western Mediterranean Sea were described throughout its entire life cycle (from larvae to adult stages) using the sagittae otoliths of 59 individuals collected in December 2009. Three characteristic zones were identified along the cross-section of the sagittae (larval, metamorphic and juvenile-adult zones). Assuming growth rings as daily increments, the age of the analysed individuals (from 3.5 to 64 mm standard length [SL]) would range from 7 to 332 days. The relationship between the number of increments and the fish SL was fitted to a von Bertalanffy growth model (SL=70.5899A~(1–exp(–0.0501(t+2.6705))). The growth pattern of C. maderensis in the western Mediterranean Sea was similar to that reported for this species in the northeast Atlantic Ocean. Though from a body size of 40-45 mm SL, growth rates declined more slowly in individuals from the western Mediterranean Sea, growth differences between these individuals and those from the northeast Atlantic Ocean were not statistically significant. This study provides new insights into the age and growth patterns of one of the most abundant mesopelagic fish species in the Mediterranean Sea that have clear implications for the study and management of marine ecosystems.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":"85 1","pages":"71-80"},"PeriodicalIF":1.4,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48614534","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 : 2021-06-11DOI: 10.3989/SCIMAR.05118.010
Samir El Atouani, Z. Belattmania, Soukaina Kaidi, A. Engelen, E. Serrão, A. Chaouti, A. Reani, B. Sabour
The present study focused on the dynamics of the phenology and life cycle of the Phaeophyceae invader Sargassum muticum at three sites on the Atlantic coast of Morocco over a period of two years (2013 and 2014). The results showed that S. muticum has two distinct growth phases; one with slower growth in winter followed by one with faster growth in spring-early summer, when the species exhibited high elongation and branching activities with thalli length ranging from 1 to more than 5 m depending on the study site. The site S1, with a rocky substratum covered by submerged sands, promotes thalli elongation, with maximum lengths of 643.33 11.10 cm recorded in July. At the rocky sites (S2 and S3), the maximum length of the seaweed depends on the pools’ depth. Although the elongation of thalli is enhanced by the water body depth, the settlements’ density (5-48 ind. m–2) seems to be mainly related to the nature of the substrate. The maturity index progressively increases from spring to early summer, when it reaches the highest values. S. muticum seems to be more abundant and more easily acclimated in shallow rockpools (sufficiently lighted and semi-exposed to wave action at the mid and lower tidal levels) than in protected sandy bottom sites with low hydrodynamic forces.
{"title":"Spatiotemporal patterns of phenology of the alien Phaeophyceae Sargassum muticum on the Atlantic coast of Morocco","authors":"Samir El Atouani, Z. Belattmania, Soukaina Kaidi, A. Engelen, E. Serrão, A. Chaouti, A. Reani, B. Sabour","doi":"10.3989/SCIMAR.05118.010","DOIUrl":"https://doi.org/10.3989/SCIMAR.05118.010","url":null,"abstract":"The present study focused on the dynamics of the phenology and life cycle of the Phaeophyceae invader Sargassum muticum at three sites on the Atlantic coast of Morocco over a period of two years (2013 and 2014). The results showed that S. muticum has two distinct growth phases; one with slower growth in winter followed by one with faster growth in spring-early summer, when the species exhibited high elongation and branching activities with thalli length ranging from 1 to more than 5 m depending on the study site. The site S1, with a rocky substratum covered by submerged sands, promotes thalli elongation, with maximum lengths of 643.33 11.10 cm recorded in July. At the rocky sites (S2 and S3), the maximum length of the seaweed depends on the pools’ depth. Although the elongation of thalli is enhanced by the water body depth, the settlements’ density (5-48 ind. m–2) seems to be mainly related to the nature of the substrate. The maturity index progressively increases from spring to early summer, when it reaches the highest values. S. muticum seems to be more abundant and more easily acclimated in shallow rockpools (sufficiently lighted and semi-exposed to wave action at the mid and lower tidal levels) than in protected sandy bottom sites with low hydrodynamic forces.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":"85 1","pages":"103-111"},"PeriodicalIF":1.4,"publicationDate":"2021-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48200584","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}
{"title":"The elephant in the room: first record of invasive gregarious species of serpulids (calcareous tube annelids) in Majorca (western Mediterranean)","authors":"Maël Grosse, Roberto Perez, Mateo Juan-Amengual, J. Pons, M. Capa","doi":"10.3989/SCIMAR.05062.002","DOIUrl":"https://doi.org/10.3989/SCIMAR.05062.002","url":null,"abstract":"1 Departament de Biologia, Universitat de les Illes Balears, Palma, Illes Balears, Spain. (MG) E-mail: maelgrosse@gmail.com. ORCID iD: https://orcid.org/0000-0002-0977-1376 (RP) E-mail: robertoperezallende@gmail.com. ORCID iD: https://orcid.org/0000-0002-5333-7307 (MJ-A) E-mail: mateujamengual444@gmail.com. ORCID iD: https://orcid.org/0000-0002-9064-8040 (MC) (Corresponding author) E-mail: maria.capa@uib.es. ORCID iD: https://orcid.org/0000-0002-5063-7961","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":"85 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41681493","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 : 2021-04-20DOI: 10.3989/SCIMAR.05065.005
C. Barrett, E. MacLeod, D. Oesterwind, V. Laptikhovsky
The lesser flying squid (Todaropsis eblanae) and the shortfin squid (Illex coindetii) are two abundant ommastrephids of the northeast Atlantic. Spawning ground existence was inferred from the captures of mature, mated females in summer 2016–2019 and their occurrences were compared with respective oceanographic data from international surveys to gain insight into environmental predictors of their presence throughout the North Sea. Spawning T. eblanae were found in relatively cooler and more saline waters (6–8°C, 34.2–35.1 psu) in the northern North Sea linked to the Fair Isle Current and East Shetland Atlantic Inflow, whilst spawning I. coindetii occurred across the entire North Sea (mostly at 9–10.5°C, 34.1–34.8 psu). We hypothesize that a combination of water salinity and water temperature are key factors in the spatiotemporal distribution of spawning ommastrephid squids as they define water density that is crucial for pelagic egg mass to attain neutral buoyancy.
{"title":"Ommastrephid squid spawning in the North Sea: oceanography, climate change and species range expansion","authors":"C. Barrett, E. MacLeod, D. Oesterwind, V. Laptikhovsky","doi":"10.3989/SCIMAR.05065.005","DOIUrl":"https://doi.org/10.3989/SCIMAR.05065.005","url":null,"abstract":"The lesser flying squid (Todaropsis eblanae) and the shortfin squid (Illex coindetii) are two abundant ommastrephids of the northeast Atlantic. Spawning ground existence was inferred from the captures of mature, mated females in summer 2016–2019 and their occurrences were compared with respective oceanographic data from international surveys to gain insight into environmental predictors of their presence throughout the North Sea. Spawning T. eblanae were found in relatively cooler and more saline waters (6–8°C, 34.2–35.1 psu) in the northern North Sea linked to the Fair Isle Current and East Shetland Atlantic Inflow, whilst spawning I. coindetii occurred across the entire North Sea (mostly at 9–10.5°C, 34.1–34.8 psu). We hypothesize that a combination of water salinity and water temperature are key factors in the spatiotemporal distribution of spawning ommastrephid squids as they define water density that is crucial for pelagic egg mass to attain neutral buoyancy.","PeriodicalId":21600,"journal":{"name":"Scientia Marina","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48954839","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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