Pub Date : 2022-11-26DOI: 10.1080/17451000.2023.2174262
Xiaoxiao Zou, Tian Meng, Dandan Yao, Zuo Chen, Jun Zhu, Dan Mu, S. Bao
ABSTRACT Sargassum is one of the most important economic algae in Phaeophyta. It has broad prospects for development and application in industry, agriculture, food, medicine and ecological restoration, and plays an important role in maintaining the marine ecosystem. In recent years, however, environmental degradation, offshore farming and overharvesting have changed the ecosystem structure and threatened the Sargassum resources. To understand the composition and characteristics of Sargassum in Hainan, we conducted an annual field survey of four bays around Hainan Island, including Haiwei, Qinglan, Lingshui and Sanya. Results indicated that 16 species of Sargassum were collected in the intertidal zone of Hainan Island, belonging to two subgenera, three sections, and S. polycystum was the dominant species at all stations throughout the year. Lingshui and Sanya had the highest biodiversity index, followed by Qinglan and Haiwei. The community similarity between Qinglan and Lingshui was the highest, followed by Haiwei and Sanya. The biodiversity index of Sargassum was the highest in summer, followed by late spring and autumn, and the lowest in winter.
{"title":"Benthic Sargassum composition and community characteristics in the intertidal zone of Hainan Island, China","authors":"Xiaoxiao Zou, Tian Meng, Dandan Yao, Zuo Chen, Jun Zhu, Dan Mu, S. Bao","doi":"10.1080/17451000.2023.2174262","DOIUrl":"https://doi.org/10.1080/17451000.2023.2174262","url":null,"abstract":"ABSTRACT Sargassum is one of the most important economic algae in Phaeophyta. It has broad prospects for development and application in industry, agriculture, food, medicine and ecological restoration, and plays an important role in maintaining the marine ecosystem. In recent years, however, environmental degradation, offshore farming and overharvesting have changed the ecosystem structure and threatened the Sargassum resources. To understand the composition and characteristics of Sargassum in Hainan, we conducted an annual field survey of four bays around Hainan Island, including Haiwei, Qinglan, Lingshui and Sanya. Results indicated that 16 species of Sargassum were collected in the intertidal zone of Hainan Island, belonging to two subgenera, three sections, and S. polycystum was the dominant species at all stations throughout the year. Lingshui and Sanya had the highest biodiversity index, followed by Qinglan and Haiwei. The community similarity between Qinglan and Lingshui was the highest, followed by Haiwei and Sanya. The biodiversity index of Sargassum was the highest in summer, followed by late spring and autumn, and the lowest in winter.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"555 - 565"},"PeriodicalIF":1.1,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48417453","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 : 2022-09-14DOI: 10.1080/17451000.2022.2137199
Enrico Montalbetti, V. Isa, S. Vencato, Y. Louis, S. Montano, S. Lavorano, D. Maggioni, P. Galli, D. Seveso
ABSTRACT Microplastics are a persistent and ubiquitous source of pollution in the marine environment, representing a severe threat to tropical coral reefs. The effects of microplastics on reef-building (hard) corals have been documented (interference with normal digestion process, polyp retraction, oxidative stress, impairment of the photosynthetic machinery, bleaching). However, the impact of microplastics on soft corals, the second most abundant benthos of tropical reefs, remains to be thoroughly studied. In this work, we analysed the effects of a short-term microplastic exposure on the cellular physiology of the soft coral Coelogorgia palmosa. We found that samples exposed to >50 mg l−1 of microplastic showed significant increase in the activities of the antioxidant enzymes glutathione reductase, catalase, and superoxide dismutase, suggesting a rise in oxidative stress. Furthermore, exposure to microplastics increased lipid peroxidation, indicating oxidative damage. Overall, our results show that similar to hard corals, microplastic ingestion causes oxidative stress and cellular damage in soft corals. Our study provides a first assessment of physiological effects of microplastic exposure on the soft coral, Coelogorgia palmosa, highlighting the need for further investigations about these contaminants and their influence on marine benthic fauna. Such information is crucial to understand how different reef organisms respond to microplastic pollution and who the ecological winners or losers will be in an increasingly polluted marine environment. Key policy highlights The effect of microplastic contamination at the cellular and molecular level has never been investigated before in alcyonacean corals. Concentrations of 50–70 mg l−1 of polyethylene caused significant rise in oxidative stress in Coelogorgia palmosa after 48 h. After 48 h exposure to 50 mg l−1 significant oxidative damage was recorded. No significant modulation in the expression of the cytoprotective protein Hsp60 was observed after exposure to microplastics.
微塑料是海洋环境中持续存在且无处不在的污染源，对热带珊瑚礁构成严重威胁。微塑料对造礁(硬)珊瑚的影响已被记录在案(干扰正常的消化过程、息肉收缩、氧化应激、光合作用机制受损、白化)。然而，微塑料对软珊瑚(热带珊瑚礁中第二丰富的底栖动物)的影响仍有待深入研究。在这项工作中，我们分析了短期微塑料暴露对软珊瑚Coelogorgia palmosa细胞生理学的影响。我们发现，暴露于bbb50 mg l - 1微塑料的样品显示抗氧化酶谷胱甘肽还原酶、过氧化氢酶和超氧化物歧化酶的活性显著增加，表明氧化应激增加。此外，接触微塑料会增加脂质过氧化，表明氧化损伤。总的来说，我们的研究结果表明，与硬珊瑚类似，微塑料摄入会导致软珊瑚的氧化应激和细胞损伤。我们的研究首次评估了微塑料暴露对软珊瑚(Coelogorgia palmosa)的生理影响，强调了进一步研究这些污染物及其对海洋底栖动物的影响的必要性。这些信息对于了解不同的珊瑚礁生物如何应对微塑料污染以及在污染日益严重的海洋环境中谁是生态赢家或输家至关重要。微塑料污染在细胞和分子水平上的影响从未在藻藻类珊瑚中进行过研究。50 - 70 mg l - 1的聚乙烯浓度在48 h后引起棕榈黄檀氧化应激显著升高。暴露于50 mg l - 1 48 h后，记录了显著的氧化损伤。暴露于微塑料后，细胞保护蛋白Hsp60的表达未见明显变化。
{"title":"Short-term microplastic exposure triggers cellular damage through oxidative stress in the soft coral Coelogorgia palmosa","authors":"Enrico Montalbetti, V. Isa, S. Vencato, Y. Louis, S. Montano, S. Lavorano, D. Maggioni, P. Galli, D. Seveso","doi":"10.1080/17451000.2022.2137199","DOIUrl":"https://doi.org/10.1080/17451000.2022.2137199","url":null,"abstract":"ABSTRACT Microplastics are a persistent and ubiquitous source of pollution in the marine environment, representing a severe threat to tropical coral reefs. The effects of microplastics on reef-building (hard) corals have been documented (interference with normal digestion process, polyp retraction, oxidative stress, impairment of the photosynthetic machinery, bleaching). However, the impact of microplastics on soft corals, the second most abundant benthos of tropical reefs, remains to be thoroughly studied. In this work, we analysed the effects of a short-term microplastic exposure on the cellular physiology of the soft coral Coelogorgia palmosa. We found that samples exposed to >50 mg l−1 of microplastic showed significant increase in the activities of the antioxidant enzymes glutathione reductase, catalase, and superoxide dismutase, suggesting a rise in oxidative stress. Furthermore, exposure to microplastics increased lipid peroxidation, indicating oxidative damage. Overall, our results show that similar to hard corals, microplastic ingestion causes oxidative stress and cellular damage in soft corals. Our study provides a first assessment of physiological effects of microplastic exposure on the soft coral, Coelogorgia palmosa, highlighting the need for further investigations about these contaminants and their influence on marine benthic fauna. Such information is crucial to understand how different reef organisms respond to microplastic pollution and who the ecological winners or losers will be in an increasingly polluted marine environment. Key policy highlights The effect of microplastic contamination at the cellular and molecular level has never been investigated before in alcyonacean corals. Concentrations of 50–70 mg l−1 of polyethylene caused significant rise in oxidative stress in Coelogorgia palmosa after 48 h. After 48 h exposure to 50 mg l−1 significant oxidative damage was recorded. No significant modulation in the expression of the cytoprotective protein Hsp60 was observed after exposure to microplastics.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"495 - 508"},"PeriodicalIF":1.1,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45029877","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 : 2022-09-14DOI: 10.1080/17451000.2022.2147949
F. García-Cárdenas, P. López-González
ABSTRACT Sea pens (Octocorallia: Pennatulacea) constitute one of the most important structural species in soft bottom benthic communities. Most pennatulacean species are deep-water organisms inhabiting depths from 200–6000 m. Among these deep-sea pens, a representative set of colonies from the northeastern Atlantic Anthoptilum murrayi Kölliker, 1880 was collected thanks to the BIOICE research surveys. In this study, 18 colonies of A. murrayi were used to acquire information on essential biological traits such as age and growth rates. Our results showed that the colonies collected ranged between 6–17 years, with a diametric growth rate between 0.10–0.17 mm year−1 and a linear growth rate between 14.97–15.75 mm year−1. Moreover, the number and diameter of oocytes per polyp (PRF, ERF), and the reproductive effort at the colony level (PRE, ERE) were determined. These values were compared between colonies of different sizes and within each colony. The largest observed diameter was 1179 μm for oocytes and 711.3 μm for spermatocysts. Both approaches (growth and reproduction) were correlated, indicating that a given large A. murrayi colony (∼300 mm) might be ∼17 years old and contain >7000 oocytes, from which possibly about 2000 oocytes (∼27%) would be spawned per year.
{"title":"Growth and reproductive traits of deep-sea pen Anthoptilum murrayi Kölliker, 1880, from Iceland (North Atlantic)","authors":"F. García-Cárdenas, P. López-González","doi":"10.1080/17451000.2022.2147949","DOIUrl":"https://doi.org/10.1080/17451000.2022.2147949","url":null,"abstract":"ABSTRACT Sea pens (Octocorallia: Pennatulacea) constitute one of the most important structural species in soft bottom benthic communities. Most pennatulacean species are deep-water organisms inhabiting depths from 200–6000 m. Among these deep-sea pens, a representative set of colonies from the northeastern Atlantic Anthoptilum murrayi Kölliker, 1880 was collected thanks to the BIOICE research surveys. In this study, 18 colonies of A. murrayi were used to acquire information on essential biological traits such as age and growth rates. Our results showed that the colonies collected ranged between 6–17 years, with a diametric growth rate between 0.10–0.17 mm year−1 and a linear growth rate between 14.97–15.75 mm year−1. Moreover, the number and diameter of oocytes per polyp (PRF, ERF), and the reproductive effort at the colony level (PRE, ERE) were determined. These values were compared between colonies of different sizes and within each colony. The largest observed diameter was 1179 μm for oocytes and 711.3 μm for spermatocysts. Both approaches (growth and reproduction) were correlated, indicating that a given large A. murrayi colony (∼300 mm) might be ∼17 years old and contain >7000 oocytes, from which possibly about 2000 oocytes (∼27%) would be spawned per year.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"448 - 465"},"PeriodicalIF":1.1,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43740776","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 : 2022-09-14DOI: 10.1080/17451000.2022.2137198
J. Rubio-Polania, A. González-Solis, C. Enriquez, F. Árcega-Cabrera, V. Ceja-Moreno, L. Cetina-Euan, R. Poot-Aguayo, F. Nuñez-Chan, D. Torruco
ABSTRACT Various ecosystems of the Gulf of Mexico (GoM) may be impacted by the present increase in offshore oil exploitation. To identify future changes caused by this activity, we assessed the structure of the megabenthos community in the Perdido Fold Belt (PFB) and its relationships with environmental variables, hydrocarbons, and heavy metals. To achieve this, biological and sediment samples were obtained during the surveys Perdido II (PII) and Perdido III (PIII). 325.75 103 ind km−2 and 582.34 kg AFDW km−2 were collected, distributed in 110 species. Crustaceans and echinoderms comprised more than 70% of the total abundance and biomass. The most abundant species were Astropecten cingulatus Sladen, 1883, Callinectes sapidus Rathbun, 1896, Astropecten duplicatus Gray, 1840, and Penaeus aztecus (Ives, 1891) (12.2 103 ≤ ind Km−2 ≤ 59.4 103). They also had the greatest biomass contribution (16.8 ≤ kg AFDW km−2 ≤ 192.2). BIOENV test showed the influence of depth (Z), salinity, dissolved oxygen (DO), Acenaphthylene (Acy), Fluoranthene (Flu), n-C12, n-C37, and nickel (Ni) on the community structure. Recruitment and trawling also influenced the abundance and biomass values. Despite Z defines the environmental gradient, the hydrocarbon concentration gradient within the shelf areas makes it a good candidate for developing monitoring programmes.
墨西哥湾(GoM)的各种生态系统可能受到目前海上石油开采增加的影响。为了确定这一活动引起的未来变化，我们评估了Perdido褶皱带(PFB)巨型生物群落的结构及其与环境变量、碳氢化合物和重金属的关系。为了实现这一目标，在Perdido II (PII)和Perdido III (PIII)调查期间获得了生物和沉积物样本。共收集到325.75 103 ind km−2和582.34 kg AFDW km−2，分布于110种。甲壳类和棘皮类占总丰度和生物量的70%以上。其中最丰富的种有:星形鹦鹉(Astropecten cingulatus Sladen, 1883年)、糙皮鹦鹉(calinectes sapidus ratthbun, 1896年)、双头鹦鹉(Astropecten duplicatus Gray, 1840年)和阿氏对虾(Penaeus aztecus, Ives, 1891年)(12.2 103≤和Km−2≤59.4 103)。它们的生物量贡献最大(16.8≤kg AFDW km−2≤192.2)。BIOENV试验显示了深度(Z)、盐度、溶解氧(DO)、苊(Acy)、氟蒽(Flu)、n-C12、n-C37和镍(Ni)对群落结构的影响。捕捞和拖网捕捞也影响丰度和生物量值。尽管Z定义了环境梯度，但陆架区域内的碳氢化合物浓度梯度使其成为制定监测方案的良好候选者。
{"title":"Community structure of megabenthos of Perdido Fold Belt (Tamaulipas, Mexico) and its relationship with the oceanographic and sediment parameters including potential pollutants","authors":"J. Rubio-Polania, A. González-Solis, C. Enriquez, F. Árcega-Cabrera, V. Ceja-Moreno, L. Cetina-Euan, R. Poot-Aguayo, F. Nuñez-Chan, D. Torruco","doi":"10.1080/17451000.2022.2137198","DOIUrl":"https://doi.org/10.1080/17451000.2022.2137198","url":null,"abstract":"ABSTRACT Various ecosystems of the Gulf of Mexico (GoM) may be impacted by the present increase in offshore oil exploitation. To identify future changes caused by this activity, we assessed the structure of the megabenthos community in the Perdido Fold Belt (PFB) and its relationships with environmental variables, hydrocarbons, and heavy metals. To achieve this, biological and sediment samples were obtained during the surveys Perdido II (PII) and Perdido III (PIII). 325.75 103 ind km−2 and 582.34 kg AFDW km−2 were collected, distributed in 110 species. Crustaceans and echinoderms comprised more than 70% of the total abundance and biomass. The most abundant species were Astropecten cingulatus Sladen, 1883, Callinectes sapidus Rathbun, 1896, Astropecten duplicatus Gray, 1840, and Penaeus aztecus (Ives, 1891) (12.2 103 ≤ ind Km−2 ≤ 59.4 103). They also had the greatest biomass contribution (16.8 ≤ kg AFDW km−2 ≤ 192.2). BIOENV test showed the influence of depth (Z), salinity, dissolved oxygen (DO), Acenaphthylene (Acy), Fluoranthene (Flu), n-C12, n-C37, and nickel (Ni) on the community structure. Recruitment and trawling also influenced the abundance and biomass values. Despite Z defines the environmental gradient, the hydrocarbon concentration gradient within the shelf areas makes it a good candidate for developing monitoring programmes.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"477 - 494"},"PeriodicalIF":1.1,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44683801","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 : 2022-09-14DOI: 10.1080/17451000.2022.2147950
D. R. Herrera, R. C. Costa
ABSTRACT Changes in species distribution patterns allow managers to monitor the conservation status of species. This study investigated the distribution and segregation in the blue crabs Callinectes danae and Callinectes ornatus in the South-west Atlantic subtropical shelf. We characterized the crabs’ abundance and related it to environmental factors. Abundance expressed as catch per unit effort estimates deviated significantly from crabs’ abundances assessed by years: in Year 1, station S7 showed the highest abundance for C. danae and the lowest for C. ornatus. In Year 2, the abundance of species only differed significantly in station S2. Summer was the season with the highest abundance of C. danae and spring of C. ornatus. Temperature was the environmental factor that modulated the distribution of blue crabs. The crabs presented different spatial and temporal distribution patterns, although there was no evident segregation between species. This ecological study indicates a potential site in the South-west Atlantic subtropical shelf to maintain the reproductive viability of the population.
{"title":"Distributional patterns of two sympatric blue crabs (Callinectes) and the implications for conservation management at the South-west Atlantic subtropical shelf","authors":"D. R. Herrera, R. C. Costa","doi":"10.1080/17451000.2022.2147950","DOIUrl":"https://doi.org/10.1080/17451000.2022.2147950","url":null,"abstract":"ABSTRACT\u0000 Changes in species distribution patterns allow managers to monitor the conservation status of species. This study investigated the distribution and segregation in the blue crabs Callinectes danae and Callinectes ornatus in the South-west Atlantic subtropical shelf. We characterized the crabs’ abundance and related it to environmental factors. Abundance expressed as catch per unit effort estimates deviated significantly from crabs’ abundances assessed by years: in Year 1, station S7 showed the highest abundance for C. danae and the lowest for C. ornatus. In Year 2, the abundance of species only differed significantly in station S2. Summer was the season with the highest abundance of C. danae and spring of C. ornatus. Temperature was the environmental factor that modulated the distribution of blue crabs. The crabs presented different spatial and temporal distribution patterns, although there was no evident segregation between species. This ecological study indicates a potential site in the South-west Atlantic subtropical shelf to maintain the reproductive viability of the population.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"466 - 476"},"PeriodicalIF":1.1,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48587465","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 : 2022-09-14DOI: 10.1080/17451000.2022.2147947
K. Springer, Beatrice Brix da Costa, Sam Samsuardi, A. Kunzmann
ABSTRACT Since the 1960s the demand for ornamental aquarium fish has grown steadily and consequently cyanide fishing is still a popular fishing method despite its prohibition. This poses a severe threat to coral reefs in Southeast Asia. This study aimed to investigate the short-term stress reaction on photosynthetic yield in the tissues of three different hard coral colonies (branching growth forms Pocillopora damicornis and Seriatopora hystrix, and massive Porites lobata) to initially high and then decreasing cyanide exposure, mimicking cyanide fishing by fishermen. Experiments were performed both in situ in the coral reefs of the Marine Protected Area Pulau Pieh, West Sumatra, Indonesia, and in the aquaria facilities of ZMT in Germany. A Diving-PAM fluorometer was used for in vivo stress assessment of the holobiont. While in all species the photosynthetic efficiency was significantly reduced right after cyanide application, the massive species displayed much lower ΔF/Fm’ values. After three days in cyanide-free water all three coral species recovered to initial values of Fv/Fm, except for P. lobata. No bleaching or discolouration was detected by the conclusion of the experiment after 38 days. Especially Indonesian reefs with massive corals may be therefore more severely impacted by cyanide fishing since the retention time of the water in these reefs is longer than in reefs that consist primarily of branching corals. This might have implications for the management of different reef parts of the MPA.
{"title":"Simulating cyanide fishing: photosynthetic effects of short-term cyanide exposure in three different hermatypic coral species","authors":"K. Springer, Beatrice Brix da Costa, Sam Samsuardi, A. Kunzmann","doi":"10.1080/17451000.2022.2147947","DOIUrl":"https://doi.org/10.1080/17451000.2022.2147947","url":null,"abstract":"ABSTRACT Since the 1960s the demand for ornamental aquarium fish has grown steadily and consequently cyanide fishing is still a popular fishing method despite its prohibition. This poses a severe threat to coral reefs in Southeast Asia. This study aimed to investigate the short-term stress reaction on photosynthetic yield in the tissues of three different hard coral colonies (branching growth forms Pocillopora damicornis and Seriatopora hystrix, and massive Porites lobata) to initially high and then decreasing cyanide exposure, mimicking cyanide fishing by fishermen. Experiments were performed both in situ in the coral reefs of the Marine Protected Area Pulau Pieh, West Sumatra, Indonesia, and in the aquaria facilities of ZMT in Germany. A Diving-PAM fluorometer was used for in vivo stress assessment of the holobiont. While in all species the photosynthetic efficiency was significantly reduced right after cyanide application, the massive species displayed much lower ΔF/Fm’ values. After three days in cyanide-free water all three coral species recovered to initial values of Fv/Fm, except for P. lobata. No bleaching or discolouration was detected by the conclusion of the experiment after 38 days. Especially Indonesian reefs with massive corals may be therefore more severely impacted by cyanide fishing since the retention time of the water in these reefs is longer than in reefs that consist primarily of branching corals. This might have implications for the management of different reef parts of the MPA.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"426 - 434"},"PeriodicalIF":1.1,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43034007","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 : 2022-09-14DOI: 10.1080/17451000.2022.2147951
V. Bjørdal, Herdis L. Mørk, K. Utne, A. Fernö, L. Nøttestad
ABSTRACT The North-east Atlantic mackerel stock size increased substantially from 2006–2014 coinciding with high recruitment. This resulted in a pronounced northerly geographic expansion of mackerel, followed by an influx of juvenile mackerel into Norwegian waters. The objective of this work was to study the diet and feeding intensity of juvenile mackerel at the new nursing grounds along the Norwegian coast during the summer. Juvenile mackerel were feeding as far north as 70°N. Stomach content was analysed for the first time from co-occurring juvenile and adult mackerel at the same locations. Almost 80% of all juvenile mackerel had prey in their stomachs, and juveniles had similar stomach fullness as adult mackerel in the same areas. The juveniles preyed on a wide variety of prey species and seemed to utilize both passive filter feeding and active particulate feeding. The most abundant prey group was Appendicularia, accounting for 31% of the stomach content by weight. Juveniles fed on similar prey species as adults, but their diet niche differed somewhat as adult mackerel fed more on krill. Juvenile mackerel can thus successfully survive and feed on various prey in high latitudes and can potentially be a feeding competitor to other planktivorous fish species in the area.
{"title":"The diet of juvenile Atlantic mackerel (Scomber scombrus) feeding in new northern nursery areas along the Norwegian coast","authors":"V. Bjørdal, Herdis L. Mørk, K. Utne, A. Fernö, L. Nøttestad","doi":"10.1080/17451000.2022.2147951","DOIUrl":"https://doi.org/10.1080/17451000.2022.2147951","url":null,"abstract":"ABSTRACT The North-east Atlantic mackerel stock size increased substantially from 2006–2014 coinciding with high recruitment. This resulted in a pronounced northerly geographic expansion of mackerel, followed by an influx of juvenile mackerel into Norwegian waters. The objective of this work was to study the diet and feeding intensity of juvenile mackerel at the new nursing grounds along the Norwegian coast during the summer. Juvenile mackerel were feeding as far north as 70°N. Stomach content was analysed for the first time from co-occurring juvenile and adult mackerel at the same locations. Almost 80% of all juvenile mackerel had prey in their stomachs, and juveniles had similar stomach fullness as adult mackerel in the same areas. The juveniles preyed on a wide variety of prey species and seemed to utilize both passive filter feeding and active particulate feeding. The most abundant prey group was Appendicularia, accounting for 31% of the stomach content by weight. Juveniles fed on similar prey species as adults, but their diet niche differed somewhat as adult mackerel fed more on krill. Juvenile mackerel can thus successfully survive and feed on various prey in high latitudes and can potentially be a feeding competitor to other planktivorous fish species in the area.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"415 - 425"},"PeriodicalIF":1.1,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42976886","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 : 2022-09-14DOI: 10.1080/17451000.2022.2147948
Rongfu Wang, M. Chimura, K. Sadayasu, Mitsuhiro Ishino, O. Yamamura
ABSTRACT The ontogenetic and interannual variations in the diet and feeding strategy of Pacific cod (Gadus macrocephalus) were examined based on 1302 specimens collected by a trawling net off the southern coast of Hokkaido from late June to early July during 2016–2020. The diet comprised 63 species (13 taxa). Fish was the most important prey, followed by decapod crustaceans. In 2016, walleye pollock (Gadus chalcogrammus) was the dominant fish prey species, while amphipods, decapods and Japanese lanternfish (Notoscopelus japonicus) were prominent in the diet in 2017. Japanese sardine (Sardinops melanostictus) were more predominant during 2018–2020. An ontogenetic comparison of diet indicated that smaller individuals (≤400 mm standard length, SL) preyed mainly on small prey items, such as decapod crustaceans and polychaetes, whereas larger individuals (>400 mm SL) preyed mainly on fish. Moreover, prey size exhibited a significant increasing trend with predator body length. These results suggest that Pacific cod has a flexible feeding strategy that differs by life stage. The updated information on predator–prey relationships provided herein improves our understanding of energy flow in the marine ecosystem and could facilitate ecosystem-based fishery management strategies.
摘要基于2016–2020年6月下旬至7月初在北海道南部海岸用拖网收集的1302份样本，研究了太平洋鳕鱼（Gadus macrochalus）在饮食和喂养策略方面的个体发生和年际变化。饮食包括63种（13个分类群）。鱼类是最重要的猎物，其次是十足目甲壳类动物。2016年，walleye pollock（Gadus challgrammamus）是主要的鱼类猎物，而片脚类、十足类和日本灯笼鱼（Notoscopellus japonicus）在2017年的饮食中尤为突出。日本沙丁鱼（Sardinos melanostictus）在2018-2020年期间占主导地位。饮食的个体遗传学比较表明，较小的个体（≤400 mm标准长度，SL）主要捕食小型猎物，如十足目甲壳类动物和多毛类，而体型较大的个体（>400 mm SL）主要捕食鱼类。此外，猎物的体型随着捕食者的体长呈显著增加趋势。这些结果表明，太平洋鳕鱼有一种灵活的喂养策略，因生活阶段而异。本文提供的关于捕食者-猎物关系的最新信息提高了我们对海洋生态系统中能量流动的理解，并有助于制定基于生态系统的渔业管理战略。
{"title":"Summer diet and feeding strategy of Pacific cod (Gadus macrocephalus) inhabiting the southern coast of Hokkaido, Japan","authors":"Rongfu Wang, M. Chimura, K. Sadayasu, Mitsuhiro Ishino, O. Yamamura","doi":"10.1080/17451000.2022.2147948","DOIUrl":"https://doi.org/10.1080/17451000.2022.2147948","url":null,"abstract":"ABSTRACT The ontogenetic and interannual variations in the diet and feeding strategy of Pacific cod (Gadus macrocephalus) were examined based on 1302 specimens collected by a trawling net off the southern coast of Hokkaido from late June to early July during 2016–2020. The diet comprised 63 species (13 taxa). Fish was the most important prey, followed by decapod crustaceans. In 2016, walleye pollock (Gadus chalcogrammus) was the dominant fish prey species, while amphipods, decapods and Japanese lanternfish (Notoscopelus japonicus) were prominent in the diet in 2017. Japanese sardine (Sardinops melanostictus) were more predominant during 2018–2020. An ontogenetic comparison of diet indicated that smaller individuals (≤400 mm standard length, SL) preyed mainly on small prey items, such as decapod crustaceans and polychaetes, whereas larger individuals (>400 mm SL) preyed mainly on fish. Moreover, prey size exhibited a significant increasing trend with predator body length. These results suggest that Pacific cod has a flexible feeding strategy that differs by life stage. The updated information on predator–prey relationships provided herein improves our understanding of energy flow in the marine ecosystem and could facilitate ecosystem-based fishery management strategies.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"435 - 447"},"PeriodicalIF":1.1,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45104922","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 : 2022-08-01DOI: 10.1080/17451000.2022.2101122
Imana Pal, C. Bose
{"title":"Spirulina- a marine miracle for sustainable food system","authors":"Imana Pal, C. Bose","doi":"10.1080/17451000.2022.2101122","DOIUrl":"https://doi.org/10.1080/17451000.2022.2101122","url":null,"abstract":"","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43858726","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 : 2022-07-03DOI: 10.1080/17451000.2022.2120202
U. Karadurmuş
ABSTRACT This study aimed to investigate the recolonization behaviour of the rapa whelk (Rapana venosa) and the common starfish (Asterias rubens) on the mussel beds in their natural habitat. The monitoring studies were carried out seasonally on an island covered by a complete mussel bed in the Sea of Marmara (Turkey) between 19 October 2020 and 9 August 2021. Inhabitant rapa whelk and common starfish on the experimental study island (ESI) were tagged, then moved 10 m away from ESI. The recolonization potential of tagged invaders was monitored for 14 days with underwater surveys after their local eradication each season. The percentage of returned rapa whelk to the ESI was higher than common starfish end of the monitoring period. Rapa whelk moved non-stop towards the mussel bed, reaching the ESI at the latest 6th hour. Common starfish reached the mussel bed much later (at the 15th hour) than rapa whelk. The common starfish began to leave the ESI at the end of the 7th day, while the rapa whelk addicted to the ESI for 14 days. Re-invasion behaviour varied significantly seasonally, and both invaders reached the ESI much later in winter. During the monitoring periods, the highest invader densities were seen in the patches with the most abundant mussels, indicating continued uninterrupted feeding. The re-invasion duration and daily feeding activities support the spread of these invaders and could be considered a threat to marine resources.
{"title":"Recolonization behavior of rapa whelk (Rapana venosa) and common starfish (Asterias rubens) eradicated from mussel bed","authors":"U. Karadurmuş","doi":"10.1080/17451000.2022.2120202","DOIUrl":"https://doi.org/10.1080/17451000.2022.2120202","url":null,"abstract":"ABSTRACT This study aimed to investigate the recolonization behaviour of the rapa whelk (Rapana venosa) and the common starfish (Asterias rubens) on the mussel beds in their natural habitat. The monitoring studies were carried out seasonally on an island covered by a complete mussel bed in the Sea of Marmara (Turkey) between 19 October 2020 and 9 August 2021. Inhabitant rapa whelk and common starfish on the experimental study island (ESI) were tagged, then moved 10 m away from ESI. The recolonization potential of tagged invaders was monitored for 14 days with underwater surveys after their local eradication each season. The percentage of returned rapa whelk to the ESI was higher than common starfish end of the monitoring period. Rapa whelk moved non-stop towards the mussel bed, reaching the ESI at the latest 6th hour. Common starfish reached the mussel bed much later (at the 15th hour) than rapa whelk. The common starfish began to leave the ESI at the end of the 7th day, while the rapa whelk addicted to the ESI for 14 days. Re-invasion behaviour varied significantly seasonally, and both invaders reached the ESI much later in winter. During the monitoring periods, the highest invader densities were seen in the patches with the most abundant mussels, indicating continued uninterrupted feeding. The re-invasion duration and daily feeding activities support the spread of these invaders and could be considered a threat to marine resources.","PeriodicalId":18195,"journal":{"name":"Marine Biology Research","volume":"18 1","pages":"315 - 325"},"PeriodicalIF":1.1,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59930917","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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