Pub Date : 2020-01-02DOI: 10.1080/10236244.2020.1746658
D. Bayley, A. Rose
ABSTRACT Inter-specific hunting associations can occur across a range of marine species to facilitate prey capture through co-operative behaviour. Here we describe multiple transient cross-phyla associations between day octopus (Octopus cyanea) and three fish species, including peacock grouper (Cephalopholis argus), brown-marbled grouper (Epinephelus fuscoguttatus), and gold-saddle goatfish (Parupeneus cyclostomus), in the isolated reef system of the Chagos archipelago. Observations of such hunting associations are rare, and no similar observations have been recorded for this region. The remoteness of this study site may provide some explanation for these multiple sightings, allowing natural behaviours to occur undisturbed. However, given no previous sightings of such behaviour, the limitation of available food resources following two recent mass coral mortality episodes, may have necessitated the formation of these rare/novel hunting interactions. Intensified prey scarcity and increasingly degraded habitat structure following more frequent disturbance events may therefore lead to such indirect environmentally mediated behavioural responses becoming increasingly prevalent in reef-dwelling species.
{"title":"Multi-species co-operative hunting behaviour in a remote Indian Ocean reef system","authors":"D. Bayley, A. Rose","doi":"10.1080/10236244.2020.1746658","DOIUrl":"https://doi.org/10.1080/10236244.2020.1746658","url":null,"abstract":"ABSTRACT Inter-specific hunting associations can occur across a range of marine species to facilitate prey capture through co-operative behaviour. Here we describe multiple transient cross-phyla associations between day octopus (Octopus cyanea) and three fish species, including peacock grouper (Cephalopholis argus), brown-marbled grouper (Epinephelus fuscoguttatus), and gold-saddle goatfish (Parupeneus cyclostomus), in the isolated reef system of the Chagos archipelago. Observations of such hunting associations are rare, and no similar observations have been recorded for this region. The remoteness of this study site may provide some explanation for these multiple sightings, allowing natural behaviours to occur undisturbed. However, given no previous sightings of such behaviour, the limitation of available food resources following two recent mass coral mortality episodes, may have necessitated the formation of these rare/novel hunting interactions. Intensified prey scarcity and increasingly degraded habitat structure following more frequent disturbance events may therefore lead to such indirect environmentally mediated behavioural responses becoming increasingly prevalent in reef-dwelling species.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"30 1","pages":"35 - 42"},"PeriodicalIF":1.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73709936","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 : 2020-01-02DOI: 10.1080/10236244.2020.1717338
Nicole C. Ramberg-Pihl, Kerry L. Yurewicz
ABSTRACT While the ability for crayfish to detect visual and chemical cues is well documented, relatively few studies have probed the behavioral responses of crayfish to cues from key predators that they encounter in natural environments. Therefore, we examined how northern crayfish (Faxonius virilis) (Hagen 1870) responded to (1) alarm cues from conspecifics versus chemical cues from smallmouth bass (Micropterus dolomieu) (Lacepéde 1802), (2) varying concentrations of alarm cue from conspecifics, and lastly (3) smallmouth bass visual cues, chemical cues, and a combination of the two. We found that crayfish reduced walking activity in the presence of alarm cues. Chemical cues from smallmouth bass were also capable of eliciting a behavioral response, both alone and when paired with visual cues. Understanding the behavioral mechanisms by which crayfish respond to predatory fish is important to managing freshwater systems in the context of ongoing human- and climate-aided range expansions of both taxa.
{"title":"Behavioral responses of northern crayfish (Faxonius virilis) to conspecific alarm cues and predator cues from smallmouth bass (Micropterus dolomieu)","authors":"Nicole C. Ramberg-Pihl, Kerry L. Yurewicz","doi":"10.1080/10236244.2020.1717338","DOIUrl":"https://doi.org/10.1080/10236244.2020.1717338","url":null,"abstract":"ABSTRACT While the ability for crayfish to detect visual and chemical cues is well documented, relatively few studies have probed the behavioral responses of crayfish to cues from key predators that they encounter in natural environments. Therefore, we examined how northern crayfish (Faxonius virilis) (Hagen 1870) responded to (1) alarm cues from conspecifics versus chemical cues from smallmouth bass (Micropterus dolomieu) (Lacepéde 1802), (2) varying concentrations of alarm cue from conspecifics, and lastly (3) smallmouth bass visual cues, chemical cues, and a combination of the two. We found that crayfish reduced walking activity in the presence of alarm cues. Chemical cues from smallmouth bass were also capable of eliciting a behavioral response, both alone and when paired with visual cues. Understanding the behavioral mechanisms by which crayfish respond to predatory fish is important to managing freshwater systems in the context of ongoing human- and climate-aided range expansions of both taxa.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"258 1","pages":"1 - 16"},"PeriodicalIF":1.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76208711","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 : 2020-01-02DOI: 10.1080/10236244.2020.1734000
Ursula Ugonna Odo, Ifeanyi Christian Ezeoyili, I. Aguzie, S. N. Oluah, J. Madu, C. Nwani
ABSTRACT Ivermectin® (IVM) is one of the most widely used antiparasitic drugs in human and veterinary medicine. This study assesses the effect of IVM on biometric characteristics and organ biomarkers of African catfish, Clarias gariepinus. Fish were exposed to 0.007, 0.013 and 0.033 mg/L of IVM and the brain, gill and liver were sampled on days 1, 7, 14, 21 and after 7 – day recovery. A mixed trend was observed in the values of condition factor and hepatosomatic index. There was concentration- and duration-dependent significant increase in the activities of alanine aminotransferase, aspartate aminotransferase and alkaline phosphatase in the tissues. While lipid peroxidation in the brain, liver and gill of the fish increased, activities of catalase, superoxide dismutase and glutathione peroxidase declined. IVM induced biochemical, oxidative stress, and biometric alterations in C. gariepinus juveniles. Thus, the use of the drug in aquaculture for the control of fish parasites requires stringent precautions.
{"title":"Effect of ivermectin® on biometric characteristics and organ biomarkers of African catfish Clarias gariepinus","authors":"Ursula Ugonna Odo, Ifeanyi Christian Ezeoyili, I. Aguzie, S. N. Oluah, J. Madu, C. Nwani","doi":"10.1080/10236244.2020.1734000","DOIUrl":"https://doi.org/10.1080/10236244.2020.1734000","url":null,"abstract":"ABSTRACT Ivermectin® (IVM) is one of the most widely used antiparasitic drugs in human and veterinary medicine. This study assesses the effect of IVM on biometric characteristics and organ biomarkers of African catfish, Clarias gariepinus. Fish were exposed to 0.007, 0.013 and 0.033 mg/L of IVM and the brain, gill and liver were sampled on days 1, 7, 14, 21 and after 7 – day recovery. A mixed trend was observed in the values of condition factor and hepatosomatic index. There was concentration- and duration-dependent significant increase in the activities of alanine aminotransferase, aspartate aminotransferase and alkaline phosphatase in the tissues. While lipid peroxidation in the brain, liver and gill of the fish increased, activities of catalase, superoxide dismutase and glutathione peroxidase declined. IVM induced biochemical, oxidative stress, and biometric alterations in C. gariepinus juveniles. Thus, the use of the drug in aquaculture for the control of fish parasites requires stringent precautions.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"17 1","pages":"17 - 33"},"PeriodicalIF":1.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82515136","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 : 2019-11-02DOI: 10.1080/10236244.2019.1705805
I. Sousa, J. Baeyaert, J. Gonçalves, Karim Erzini
ABSTRACT The implementation of spatial protection measures is currently a priority in batoid species' conservation strategies, but their spatial ecology remains largely unknown. We provide some preliminary insights into the movement patterns of the white skate (Rostroraja alba), a batoid classified as Critically Endangered in European waters. Three individuals (two females: one mature, one immature; and one immature male) were monitored with acoustic telemetry in a marine protected area (Portugal). The mature female remained present in the study area throughout the whole monitoring period (20 months). Residency analyses revealed this specimen spent more than 70% of the time within this coastal marine park. The immature female and the immature male were only detected during three and four months, respectively. Whether the uncovered movement patterns are common within the population remains unclear, but the present study provides useful information to better plan future research on the movement ecology of a rather unstudied species.
{"title":"Preliminary insights into the spatial ecology and movement patterns of a regionally critically endangered skate (Rostroraja alba) associated with a marine protected area","authors":"I. Sousa, J. Baeyaert, J. Gonçalves, Karim Erzini","doi":"10.1080/10236244.2019.1705805","DOIUrl":"https://doi.org/10.1080/10236244.2019.1705805","url":null,"abstract":"ABSTRACT The implementation of spatial protection measures is currently a priority in batoid species' conservation strategies, but their spatial ecology remains largely unknown. We provide some preliminary insights into the movement patterns of the white skate (Rostroraja alba), a batoid classified as Critically Endangered in European waters. Three individuals (two females: one mature, one immature; and one immature male) were monitored with acoustic telemetry in a marine protected area (Portugal). The mature female remained present in the study area throughout the whole monitoring period (20 months). Residency analyses revealed this specimen spent more than 70% of the time within this coastal marine park. The immature female and the immature male were only detected during three and four months, respectively. Whether the uncovered movement patterns are common within the population remains unclear, but the present study provides useful information to better plan future research on the movement ecology of a rather unstudied species.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"43 1","pages":"283 - 299"},"PeriodicalIF":1.0,"publicationDate":"2019-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88054793","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 : 2019-11-02DOI: 10.1080/10236244.2019.1700117
W. Eckman, K. Vicentuan, P. Todd
ABSTRACT This paper examines the responses of the fluted giant clam Tridacna squamosa pediveligers to elevated temperature and reduced light levels. In a light reduction experiment, a total of 104,000 T. squamosa pediveligers were exposed to four different levels of shading for approximately one month. The most heavily shaded treatment, at 0.4% of ambient light, had significantly lower survival than the other groups, which all received 1% or more of ambient light. In a second experiment, for approximately two weeks 13,000 T. squamosa pediveligers were divided among three treatments: one at ambient temperature averaging 29.5 °C, and two with elevated temperatures averaging 32.2 °C and 34.8 °C. The elevated temperature treatments resulted in near total mortality. The highest temperature survived by any pediveliger was 32.8 °C. Our results indicate a potential synergetic effect, with turbidity causing giant clam pediveligers to settle in shallower water―where they will likely be exposed to higher temperatures.
{"title":"Effects of low light and high temperature on pediveligers of the fluted giant clam Tridacna squamosa","authors":"W. Eckman, K. Vicentuan, P. Todd","doi":"10.1080/10236244.2019.1700117","DOIUrl":"https://doi.org/10.1080/10236244.2019.1700117","url":null,"abstract":"ABSTRACT This paper examines the responses of the fluted giant clam Tridacna squamosa pediveligers to elevated temperature and reduced light levels. In a light reduction experiment, a total of 104,000 T. squamosa pediveligers were exposed to four different levels of shading for approximately one month. The most heavily shaded treatment, at 0.4% of ambient light, had significantly lower survival than the other groups, which all received 1% or more of ambient light. In a second experiment, for approximately two weeks 13,000 T. squamosa pediveligers were divided among three treatments: one at ambient temperature averaging 29.5 °C, and two with elevated temperatures averaging 32.2 °C and 34.8 °C. The elevated temperature treatments resulted in near total mortality. The highest temperature survived by any pediveliger was 32.8 °C. Our results indicate a potential synergetic effect, with turbidity causing giant clam pediveligers to settle in shallower water―where they will likely be exposed to higher temperatures.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"82 1","pages":"255 - 264"},"PeriodicalIF":1.0,"publicationDate":"2019-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89022325","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 : 2019-11-02DOI: 10.1080/10236244.2020.1713701
Corie L. Charpentier, Christopher S. Angell, Patrick I. Duffy, Jonathan H. Cohen
ABSTRACT Fish odor induces predator avoidance behaviors in zooplankton, like vertical migration, by making zooplankton more responsive to light. Odor cues that alter behavior in marine crustacean zooplankton in the laboratory include sulfated glycosaminoglycans (sGAGs) derived from fish body mucus. Few studies quantify these cues in estuarine/marine environments or assess whether laboratory studies reflect natural scenarios. We collected fish and water samples weekly in Broadkill River, Delaware, USA. We used field-collected water in colorimetric assays to determine the concentration of sGAG-equivalent molecules and in behavioral assays with a zooplankton model, brine shrimp (Artemia spp.) nauplii, which only descend in response to downwelling light after fish odor exposure. Fish quantity was positively related to sGAG-equivalents and zooplankton photosensitivity, indicated by descent responses at lower light levels and across a broad intensity range. Our results support that fish odor concentrations used in previous laboratory assays are consistent with levels found in an estuary.
{"title":"Natural variations in estuarine fish, fish odor, and zooplankton photobehavior","authors":"Corie L. Charpentier, Christopher S. Angell, Patrick I. Duffy, Jonathan H. Cohen","doi":"10.1080/10236244.2020.1713701","DOIUrl":"https://doi.org/10.1080/10236244.2020.1713701","url":null,"abstract":"ABSTRACT Fish odor induces predator avoidance behaviors in zooplankton, like vertical migration, by making zooplankton more responsive to light. Odor cues that alter behavior in marine crustacean zooplankton in the laboratory include sulfated glycosaminoglycans (sGAGs) derived from fish body mucus. Few studies quantify these cues in estuarine/marine environments or assess whether laboratory studies reflect natural scenarios. We collected fish and water samples weekly in Broadkill River, Delaware, USA. We used field-collected water in colorimetric assays to determine the concentration of sGAG-equivalent molecules and in behavioral assays with a zooplankton model, brine shrimp (Artemia spp.) nauplii, which only descend in response to downwelling light after fish odor exposure. Fish quantity was positively related to sGAG-equivalents and zooplankton photosensitivity, indicated by descent responses at lower light levels and across a broad intensity range. Our results support that fish odor concentrations used in previous laboratory assays are consistent with levels found in an estuary.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"52 1","pages":"265 - 282"},"PeriodicalIF":1.0,"publicationDate":"2019-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81720592","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 : 2019-09-03DOI: 10.1080/10236244.2019.1677468
Sneha Dineshan, Arath Raghavan Sudha Devi
ABSTRACT This study detailed the histomorphology of the male reproductive system and seasonality in the reproduction of a recently described genus and species of freshwater crab Arcithelphusa cochleariformis. Results indicated that the testis and vas deferens underwent correlative changes in accord with the active, inactive and revival phases of spermatogenesis. The spermatogenic activity was at its peak during June evinced from large fully extended acini with full package of mature spermatozoa and low during September–February with decreased acinar dimensions, pycnotic germ cells and residual sperms. Seasonal cyclicity was also observed in the thickness of epithelium, muscle layer, diameter of lumen and the amount of luminal contents of the vas deferens. In June, the anterior and middle vas deferenswere filled with secretions and spermatophores.By September, ruptured spermatophores with freely dispersed pycnotic spermatozoa were perceptible in the anterior and middle vas deferens and lysed spermatophoric debris in posterior vas deferens.
{"title":"Morphology of the male reproductive system and seasonality in reproduction in the freshwater crab Arcithelphusa cochleariformis (Brachyura: Gecarcinucidae)","authors":"Sneha Dineshan, Arath Raghavan Sudha Devi","doi":"10.1080/10236244.2019.1677468","DOIUrl":"https://doi.org/10.1080/10236244.2019.1677468","url":null,"abstract":"ABSTRACT This study detailed the histomorphology of the male reproductive system and seasonality in the reproduction of a recently described genus and species of freshwater crab Arcithelphusa cochleariformis. Results indicated that the testis and vas deferens underwent correlative changes in accord with the active, inactive and revival phases of spermatogenesis. The spermatogenic activity was at its peak during June evinced from large fully extended acini with full package of mature spermatozoa and low during September–February with decreased acinar dimensions, pycnotic germ cells and residual sperms. Seasonal cyclicity was also observed in the thickness of epithelium, muscle layer, diameter of lumen and the amount of luminal contents of the vas deferens. In June, the anterior and middle vas deferenswere filled with secretions and spermatophores.By September, ruptured spermatophores with freely dispersed pycnotic spermatozoa were perceptible in the anterior and middle vas deferens and lysed spermatophoric debris in posterior vas deferens.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"93 1","pages":"217 - 240"},"PeriodicalIF":1.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74958850","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 : 2019-09-03DOI: 10.1080/10236244.2019.1671769
L. Torre-Williams, E. Martínez, J. Meynecke, J. Reinke, K. Stockin
ABSTRACT The majority of humpback whales (Megaptera novaeangliae) undertake an annual migration from high latitude feeding grounds to tropical/subtropical breeding grounds. Suitable calving habitat for this species includes warm (typically 19°C to 28°C), shallow, sheltered waters in tropical and subtropical waters. Here, we investigated occurrence of calving beyond the primary recognised breeding grounds (16° to 24°S) of the east Australian humpback whale population (E1). We examined location, depth (m), and SST (⁰C) associated with newborn observations in Gold Coast Bay, in southern Queensland, Australia from 2013 to 2016. A total of 74 newborns were recorded in the study area, with the majority observed in July and August. These findings may signify that the Gold Coast Bay provides an apparently suitable habitat for calving for this humpback whale population. As the area has not been classified as calving habitat, these findings will assist conservation managers in making informed management decisions regarding this species.
{"title":"Presence of newborn humpback whale (Megaptera novaeangliae) calves in Gold Coast Bay, Australia","authors":"L. Torre-Williams, E. Martínez, J. Meynecke, J. Reinke, K. Stockin","doi":"10.1080/10236244.2019.1671769","DOIUrl":"https://doi.org/10.1080/10236244.2019.1671769","url":null,"abstract":"ABSTRACT The majority of humpback whales (Megaptera novaeangliae) undertake an annual migration from high latitude feeding grounds to tropical/subtropical breeding grounds. Suitable calving habitat for this species includes warm (typically 19°C to 28°C), shallow, sheltered waters in tropical and subtropical waters. Here, we investigated occurrence of calving beyond the primary recognised breeding grounds (16° to 24°S) of the east Australian humpback whale population (E1). We examined location, depth (m), and SST (⁰C) associated with newborn observations in Gold Coast Bay, in southern Queensland, Australia from 2013 to 2016. A total of 74 newborns were recorded in the study area, with the majority observed in July and August. These findings may signify that the Gold Coast Bay provides an apparently suitable habitat for calving for this humpback whale population. As the area has not been classified as calving habitat, these findings will assist conservation managers in making informed management decisions regarding this species.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"118 1","pages":"199 - 216"},"PeriodicalIF":1.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75044101","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 : 2019-09-03DOI: 10.1080/10236244.2019.1681898
Tayna Figueiredo Strefezza, Isabel Marques De Andrade, Alessandra Augusto
ABSTRACT Minuca mordax is a model for studies on ocean acidification and sea-level rise because lives in mangroves and riverbanks with low pH. We investigated the physiology of the crabs exposed to differents pH (6.5 and 5.8) and salinity (25, 30, 35, 40 45S). There was not mortality or alterations in the hypo-osmoregulation, suggesting that the factors did not affect salt absorption/secretion. Reduced pH changed metabolism, ammonia excretion, and hepatosomatic index in relation to the animals kept in control pH. At elevated salinities, metabolism increased when animals were kept in control pH, but it decreased when they were exposed to acidified pH. energy substrate, varied between proteins to a mixture of proteins and lipids. Important physiological parameters, related to the catabolism of amino acids and to the energy demand are changed and the consequences might include alterations in growth and reproduction due to the energy channeling to limiting processes of homeostasis.
{"title":"Reduced pH and elevated salinities affect the physiology of intertidal crab Minuca mordax (Crustacea, Decapoda)","authors":"Tayna Figueiredo Strefezza, Isabel Marques De Andrade, Alessandra Augusto","doi":"10.1080/10236244.2019.1681898","DOIUrl":"https://doi.org/10.1080/10236244.2019.1681898","url":null,"abstract":"ABSTRACT Minuca mordax is a model for studies on ocean acidification and sea-level rise because lives in mangroves and riverbanks with low pH. We investigated the physiology of the crabs exposed to differents pH (6.5 and 5.8) and salinity (25, 30, 35, 40 45S). There was not mortality or alterations in the hypo-osmoregulation, suggesting that the factors did not affect salt absorption/secretion. Reduced pH changed metabolism, ammonia excretion, and hepatosomatic index in relation to the animals kept in control pH. At elevated salinities, metabolism increased when animals were kept in control pH, but it decreased when they were exposed to acidified pH. energy substrate, varied between proteins to a mixture of proteins and lipids. Important physiological parameters, related to the catabolism of amino acids and to the energy demand are changed and the consequences might include alterations in growth and reproduction due to the energy channeling to limiting processes of homeostasis.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"26 1","pages":"241 - 254"},"PeriodicalIF":1.0,"publicationDate":"2019-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80263812","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 : 2019-07-04DOI: 10.1080/10236244.2019.1661779
Kaveh Ahmadpanah, M. Soltani, Houman Rajabi Islami, M. Shamsaie
ABSTRACT This study investigated the effects of nonylphenol (NP) on hematological and immunological parameters in both male and female rainbow trout (Oncorhynchus mykiss). Fish were randomly distributed into six groups and administered with NP (10, 50 and 100 μg g-1 week-1 BW) and a single dose of 17-β estradiol (E2; 2 μg g-1 week-1 BW, positive control). The solvent controls received ethanol and coconut oil as a vehicle, while the controls were not injected. Red blood cells (RBCs) count, hematocrit (Hct), hemoglobin (Hb), white blood cells (WBCs), and lymphocytes demonstrated a NP dose-dependent decrease, whereas mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), monocytes, and neutrophils showed an increasing trend in both male and female fish 21 days post-treatment. Also, RBCs, Hb, MCHC, WBCs, and lymphocytes were significantly reduced (p<0.05) in E2 treated fish. Lysozyme, complement components (C3 and C4) and immunoglobulin M (IgM) were increased in fish sera subjected to 10 and 50 μg g-1 NP, while these decreased in groups administered with 100 μg g-1 NP and 2 μg g-1 E2. Except for C4 level at 10 μg g-1 NP, no significant differences were observed in hematological and immunological parameters of male and female in each treatment. Overall, a frequent exposure to NP could lead to adverse effects on fish immune-physiological functions which may cause serious ecological threats of fish natural population sustainability.
{"title":"Effects of nonylphenol on hematological parameters and immune responses in immature rainbow trout (Oncorhynchus mykiss)","authors":"Kaveh Ahmadpanah, M. Soltani, Houman Rajabi Islami, M. Shamsaie","doi":"10.1080/10236244.2019.1661779","DOIUrl":"https://doi.org/10.1080/10236244.2019.1661779","url":null,"abstract":"ABSTRACT This study investigated the effects of nonylphenol (NP) on hematological and immunological parameters in both male and female rainbow trout (Oncorhynchus mykiss). Fish were randomly distributed into six groups and administered with NP (10, 50 and 100 μg g-1 week-1 BW) and a single dose of 17-β estradiol (E2; 2 μg g-1 week-1 BW, positive control). The solvent controls received ethanol and coconut oil as a vehicle, while the controls were not injected. Red blood cells (RBCs) count, hematocrit (Hct), hemoglobin (Hb), white blood cells (WBCs), and lymphocytes demonstrated a NP dose-dependent decrease, whereas mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), monocytes, and neutrophils showed an increasing trend in both male and female fish 21 days post-treatment. Also, RBCs, Hb, MCHC, WBCs, and lymphocytes were significantly reduced (p<0.05) in E2 treated fish. Lysozyme, complement components (C3 and C4) and immunoglobulin M (IgM) were increased in fish sera subjected to 10 and 50 μg g-1 NP, while these decreased in groups administered with 100 μg g-1 NP and 2 μg g-1 E2. Except for C4 level at 10 μg g-1 NP, no significant differences were observed in hematological and immunological parameters of male and female in each treatment. Overall, a frequent exposure to NP could lead to adverse effects on fish immune-physiological functions which may cause serious ecological threats of fish natural population sustainability.","PeriodicalId":18210,"journal":{"name":"Marine and Freshwater Behaviour and Physiology","volume":"8 1","pages":"151 - 165"},"PeriodicalIF":1.0,"publicationDate":"2019-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89357335","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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