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6. Littoral Water in Hong Kong as a Potential Transient Habitat for Juveniles of a Temperate Deepwater Gnomefish, Scombrops boops (Acropomatiformes: Scombropidae)

Author

Wei, Jiehong, Gu, Jiarui, Liu, Min, Lin, Bai-an, Lee, Gabriel Y., Wai, Tak-Cheung, Lam, Paul K.S., Yan, Meng, and Leung, Priscilla T.Y.

Subjects
Research Article
Abstract

A total of 40 juveniles belonging to a temperate deepwater gnomefish species, Scombrops boops, were sampled from littoral habitats (2–5 m depth) of eastern Hong Kong waters in April and May 2017 and March 2019. The presence of gnomefish juveniles in subtropical southern China is reported for the first time at a record low latitude of 22°11'–22°21'N. The specimens were identified based on the COI gene sequence. The genetic composition between Japan and Hong Kong gnomefish populations were compared by sequencing the mitochondrial Cytb gene, which showed no genetic differentiation. The juveniles ranged from 3.5–10.1 cm (n = 40) in total length, with 35 individuals caught from Sargassum beds and five from rocky reefs. Our findings highlighted that the littoral habitats in Hong Kong waters, in particular the seasonal Sargassum beds, are important for small juveniles of S. boops.

Published
2021

8. A global perspective on the trophic geography of sharks

Author

Bird, Christopher S., Verissimo, Ana, Magozzi, Sarah, Abrantes, Katya G., Aguilar, Alex, Al-reasi, Hassan, Barnett, Adam, Bethea, Dana M., Biais, Gerard, Borrell, Asuncion, Bouchoucha, Marc, Boyle, Mariah, Brooks, Edward J., Brunnschweiler, Juerg, Bustamante, Paco, Carlisle, Aaron, Catarino, Diana, Caut, Stephane, Cherel, Yves, Chouvelon, Tiphaine, Churchill, Diana, Ciancio, Javier, Claes, Julien, Colaco, Ana, Courtney, Dean L., Cresson, Pierre, Daly, Ryan, De Necker, Leigh, Endo, Tetsuya, Figueiredo, Ivone, Frisch, Ashley J., Hansen, Joan Holst, Heithaus, Michael, Hussey, Nigel E., Iitembu, Johannes, Juanes, Francis, Kinney, Michael J., Kiszka, Jeremy J., Klarian, Sebastian A., Kopp, Dorothee, Leaf, Robert, Li, Yunkai, Lorrain, Anne, Madigan, Daniel J., Maljkovic, Aleksandra, Malpica-cruz, Luis, Matich, Philip, Meekan, Mark G., Menard, Frederic, Menezes, Gui M., Munroe, Samantha E. M., Newman, Michael C., Papastamatiou, Yannis P., Pethybridge, Heidi, Plumlee, Jeffrey D., Polo-silva, Carlos, Quaeck-davies, Katie, Raoult, Vincent, Reum, Jonathan, Torres-rojas, Yassir Eden, Shiffman, David S., Shipley, Oliver N., Speed, Conrad W., Staudinger, Michelle D., Teffer, Amy K., Tilley, Alexander, Valls, Maria, Vaudo, Jeremy J., Wai, Tak-cheung, Wells, R. J. David, Wyatt, Alex S. J., Yool, Andrew, Trueman, Clive N., Bird, Christopher S., Verissimo, Ana, Magozzi, Sarah, Abrantes, Katya G., Aguilar, Alex, Al-reasi, Hassan, Barnett, Adam, Bethea, Dana M., Biais, Gerard, Borrell, Asuncion, Bouchoucha, Marc, Boyle, Mariah, Brooks, Edward J., Brunnschweiler, Juerg, Bustamante, Paco, Carlisle, Aaron, Catarino, Diana, Caut, Stephane, Cherel, Yves, Chouvelon, Tiphaine, Churchill, Diana, Ciancio, Javier, Claes, Julien, Colaco, Ana, Courtney, Dean L., Cresson, Pierre, Daly, Ryan, De Necker, Leigh, Endo, Tetsuya, Figueiredo, Ivone, Frisch, Ashley J., Hansen, Joan Holst, Heithaus, Michael, Hussey, Nigel E., Iitembu, Johannes, Juanes, Francis, Kinney, Michael J., Kiszka, Jeremy J., Klarian, Sebastian A., Kopp, Dorothee, Leaf, Robert, Li, Yunkai, Lorrain, Anne, Madigan, Daniel J., Maljkovic, Aleksandra, Malpica-cruz, Luis, Matich, Philip, Meekan, Mark G., Menard, Frederic, Menezes, Gui M., Munroe, Samantha E. M., Newman, Michael C., Papastamatiou, Yannis P., Pethybridge, Heidi, Plumlee, Jeffrey D., Polo-silva, Carlos, Quaeck-davies, Katie, Raoult, Vincent, Reum, Jonathan, Torres-rojas, Yassir Eden, Shiffman, David S., Shipley, Oliver N., Speed, Conrad W., Staudinger, Michelle D., Teffer, Amy K., Tilley, Alexander, Valls, Maria, Vaudo, Jeremy J., Wai, Tak-cheung, Wells, R. J. David, Wyatt, Alex S. J., Yool, Andrew, and Trueman, Clive N.

Abstract

Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits in trophic interactions between sharks found in different habitats. We show that populations of shelf-dwelling sharks derive a substantial proportion of their carbon from regional pelagic sources, but contain individuals that forage within additional isotopically diverse local food webs, such as those supported by terrestrial plant sources, benthic production and macrophytes. In contrast, oceanic sharks seem to use carbon derived from between 30° and 50° of latitude. Global-scale compilations of stable isotope data combined with biogeochemical modelling generate hypotheses regarding animal behaviours that can be tested with other methodological approaches.

Published
2018
Full Text
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9. A global perspective on the trophic geography of sharks

Author

University of Southampton, Natural Environment Research Council (UK), Bird, Christopher Stephen, Veríssimo, Ana, Magozzi, Sarah, Abrantes, Kátya G., Aguilar, Alex, Al-Reasi, Hassan, Barnett, Adam, Bethea, Dana M., Biais, Gérard, Borrell, Asuncion, Bouchoucha, Marc, Boyle, Mariah, Brooks, Edward J., Brunnschweiler, Juerg, Bustamante, Paco, Carlisle, Aaron, Catarino, Diana, Caut, Stéphane, Cherel, Yves, Chouvelon, Tiphaine, Churchill, Diana, Ciancio, Javier, Claes, Julien, Colaço, Ana, Courtney, Dean L., Cresson, Pierre, Daly, Ryan, De Necker, Leigh, Endo, Tetsuya, Figueiredo, Ivone, Frisch, Ashley J., Hansen, Joan Holst, Heithaus, Michael, Hussey, Nigel E., Iitembu, Johannes, Juanes, Francis, Kinney, Michael J., Kiszka, Jeremy J., Klarian, Sebastian A., Kopp, Dorothée, Leaf, Robert, Li, Yunkai, Lorrain, Anne, Madigan, Daniel J., Maljković, Aleksandra, Malpica-Cruz, Luis, Matich, Philip, Meekan, Mark G., Ménard, Frédéric, Menezes, Gui M., Munroe, Samantha E.M., Newman, Michael C., Papastamatiou, Yannis P., Pethybridge, Heidi, Plumlee, Jeffrey D., Polo-Silva, Carlos, Quaeck-Davies, Katie, Raoult, Vincent, Reum, Jonathan, Torres-Rojas, Yassir Eden, Shiffman, David S., Shipley, Oliver N., Speed, Conrad W., Staudinger, Michelle D., Teffer, Amy K., Tilley, Alexander, Valls, Maria, Vaudo, Jeremy J., Wai, Tak-Cheung, Wells, R. J. David, Wyatt, Alex S. J., Yool, Andrew, Trueman, Clive N., University of Southampton, Natural Environment Research Council (UK), Bird, Christopher Stephen, Veríssimo, Ana, Magozzi, Sarah, Abrantes, Kátya G., Aguilar, Alex, Al-Reasi, Hassan, Barnett, Adam, Bethea, Dana M., Biais, Gérard, Borrell, Asuncion, Bouchoucha, Marc, Boyle, Mariah, Brooks, Edward J., Brunnschweiler, Juerg, Bustamante, Paco, Carlisle, Aaron, Catarino, Diana, Caut, Stéphane, Cherel, Yves, Chouvelon, Tiphaine, Churchill, Diana, Ciancio, Javier, Claes, Julien, Colaço, Ana, Courtney, Dean L., Cresson, Pierre, Daly, Ryan, De Necker, Leigh, Endo, Tetsuya, Figueiredo, Ivone, Frisch, Ashley J., Hansen, Joan Holst, Heithaus, Michael, Hussey, Nigel E., Iitembu, Johannes, Juanes, Francis, Kinney, Michael J., Kiszka, Jeremy J., Klarian, Sebastian A., Kopp, Dorothée, Leaf, Robert, Li, Yunkai, Lorrain, Anne, Madigan, Daniel J., Maljković, Aleksandra, Malpica-Cruz, Luis, Matich, Philip, Meekan, Mark G., Ménard, Frédéric, Menezes, Gui M., Munroe, Samantha E.M., Newman, Michael C., Papastamatiou, Yannis P., Pethybridge, Heidi, Plumlee, Jeffrey D., Polo-Silva, Carlos, Quaeck-Davies, Katie, Raoult, Vincent, Reum, Jonathan, Torres-Rojas, Yassir Eden, Shiffman, David S., Shipley, Oliver N., Speed, Conrad W., Staudinger, Michelle D., Teffer, Amy K., Tilley, Alexander, Valls, Maria, Vaudo, Jeremy J., Wai, Tak-Cheung, Wells, R. J. David, Wyatt, Alex S. J., Yool, Andrew, and Trueman, Clive N.

Abstract

Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits in trophic interactions between sharks found in different habitats. We show that populations of shelf-dwelling sharks derive a substantial proportion of their carbon from regional pelagic sources, but contain individuals that forage within additional isotopically diverse local food webs, such as those supported by terrestrial plant sources, benthic production and macrophytes. In contrast, oceanic sharks seem to use carbon derived from between 30° and 50° of latitude. Global-scale compilations of stable isotope data combined with biogeochemical modelling generate hypotheses regarding animal behaviours that can be tested with other methodological approaches.

Published
2018

10. Data from: A global perspective on the trophic geography of sharks

Author

Bird, Christopher Stephen, Veríssimo, Ana, Magozzi, Sarah, Abrantes, Kátya G., Aguilar, Alex, Al-Reasi, Hassan, Barnett, Adam, Bethea, Dana M., Biais, Gérard, Borrell, Asuncion, Bouchoucha, Marc, Boyle, Mariah, Brooks, Edward J., Brunnschweiler, Juerg, Bustamante, Paco, Carlisle, Aaron, Catarino, Diana, Caut, Stéphane, Cherel, Yves, Chouvelon, Tiphaine, Churchill, Diana, Ciancio, Javier, Claes, Julien, Colaço, Ana, Courtney, Dean L., Cresson, Pierre, Daly, Ryan, De Necker, Leigh, Endo, Tetsuya, Figueiredo, Ivone, Frisch, Ashley J., Hansen, Joan Holst, Heithaus, Michael, Hussey, Nigel E., Iitembu, Johannes, Juanes, Francis, Kinney, Michael J., Kiszka, Jeremy J., Klarian, Sebastian A., Kopp, Dorothée, Leaf, Robert, Li, Yunkai, Lorrain, Anne, Madigan, Daniel J., Maljković, Aleksandra, Malpica-Cruz, Luis, Matich, Philip, Meekan, Mark G., Ménard, Frédéric, Menezes, Gui M., Munroe, Samantha E.M., Newman, Michael C., Papastamatiou, Yannis P., Pethybridge, Heidi, Plumlee, Jeffrey D., Polo-Silva, Carlos, Quaeck-Davies, Katie, Raoult, Vincent, Reum, Jonathan, Torres-Rojas, Yassir Eden, Shiffman, David S., Shipley, Oliver N., Speed, Conrad W., Staudinger, Michelle D., Teffer, Amy K., Tilley, Alexander, Valls, Maria, Vaudo, Jeremy J., Wai, Tak-Cheung, Wells, R. J. David, Wyatt, Alex S. J., Yool, Andrew, Trueman, Clive N., Bird, Christopher Stephen, Veríssimo, Ana, Magozzi, Sarah, Abrantes, Kátya G., Aguilar, Alex, Al-Reasi, Hassan, Barnett, Adam, Bethea, Dana M., Biais, Gérard, Borrell, Asuncion, Bouchoucha, Marc, Boyle, Mariah, Brooks, Edward J., Brunnschweiler, Juerg, Bustamante, Paco, Carlisle, Aaron, Catarino, Diana, Caut, Stéphane, Cherel, Yves, Chouvelon, Tiphaine, Churchill, Diana, Ciancio, Javier, Claes, Julien, Colaço, Ana, Courtney, Dean L., Cresson, Pierre, Daly, Ryan, De Necker, Leigh, Endo, Tetsuya, Figueiredo, Ivone, Frisch, Ashley J., Hansen, Joan Holst, Heithaus, Michael, Hussey, Nigel E., Iitembu, Johannes, Juanes, Francis, Kinney, Michael J., Kiszka, Jeremy J., Klarian, Sebastian A., Kopp, Dorothée, Leaf, Robert, Li, Yunkai, Lorrain, Anne, Madigan, Daniel J., Maljković, Aleksandra, Malpica-Cruz, Luis, Matich, Philip, Meekan, Mark G., Ménard, Frédéric, Menezes, Gui M., Munroe, Samantha E.M., Newman, Michael C., Papastamatiou, Yannis P., Pethybridge, Heidi, Plumlee, Jeffrey D., Polo-Silva, Carlos, Quaeck-Davies, Katie, Raoult, Vincent, Reum, Jonathan, Torres-Rojas, Yassir Eden, Shiffman, David S., Shipley, Oliver N., Speed, Conrad W., Staudinger, Michelle D., Teffer, Amy K., Tilley, Alexander, Valls, Maria, Vaudo, Jeremy J., Wai, Tak-Cheung, Wells, R. J. David, Wyatt, Alex S. J., Yool, Andrew, and Trueman, Clive N.

Abstract

Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits in trophic interactions between sharks found in different habitats. We show that populations of shelf-dwelling sharks derive a substantial proportion of their carbon from regional pelagic sources, but contain individuals that forage within additional isotopically diverse local food webs, such as those supported by terrestrial plant sources, benthic production and macrophytes. In contrast, oceanic sharks seem to use carbon derived from between 30° and 50° of latitude. Global-scale compilations of stable isotope data combined with biogeochemical modelling generate hypotheses regarding animal behaviours that can be tested with other methodological approaches.

Published
2018

11. Responses of the limpet, Cellana grata (Gould 1859), to hypo-osmotic stress during simulated tropical, monsoon rains

Author

Morritt, David, Leung, Kenneth M. Y., De Pirro, Maurizio, Yau, Cynthia, Wai, Tak-Cheung, Williams, Gary A., Morritt, David, Leung, Kenneth M. Y., De Pirro, Maurizio, Yau, Cynthia, Wai, Tak-Cheung, and Williams, Gary A.

Abstract

Although heat stress is often cited as the dominant physical stress on tropical shores, intertidal organisms in regions with monsoonal climates are also regularly exposed to prolonged periods of heavy rainfall. Such events are predicted to have adverse physiological effects on individuals and may result in mortality. In a series of laboratory experiments, the impact of simulated monsoonal rains was investigated on the patellid limpet, Cellana grata. Sub-lethal responses in terms of body water content, body fluid osmolality and heart rate were measured in two different size cohorts maintained on horizontal and vertical substrata. Limpets were unable to achieve any effective behavioural isolation, and exposure to either simulated rainfall or diluted seawater resulted in both large and small C. grata gaining water with subsequent dilution of mantle water and haemolymph osmolalities. With increased duration of rainfall, dilution of body fluids increased with little difference between individuals on horizontal and vertical surfaces. Body fluids generally showed proportional dilution during prolonged rain, but in some individuals there was evidence for regulation of the haemolymph relative to the mantle fluid. Overall, smaller limpets were more susceptible to prolonged rainfall than large animals in terms of swelling of soft tissues and detachment and also had higher heart rates than large limpets. Both cohorts reduced heart rates with prolonged rainfall, suggesting a degree of metabolic depression, especially on horizontal surfaces. In small limpets, no difference in heart rate was found with substratum orientation, whereas large limpets had elevated heart rates on vertical as compared to horizontal substrata, when exposed to either simulated rainfall or washed with dilute seawater. This may reflect the increased energetic costs required to maintain a relatively larger body on a vertical surface under stressful conditions. Monsoonal rainfall during emersion, and subseque

Published
2007

13. Littoral Water in Hong Kong as a Potential Transient Habitat for Juveniles of a Temperate Deepwater Gnomefish, Scombrops boops (Acropomatiformes: Scombropidae).

Author

Wei J, Gu J, Liu M, Lin BA, Lee GY, Wai TC, Lam PKS, Yan M, and Leung PTY

Abstract

A total of 40 juveniles belonging to a temperate deepwater gnomefish species, Scombrops boops , were sampled from littoral habitats (2-5 m depth) of eastern Hong Kong waters in April and May 2017 and March 2019. The presence of gnomefish juveniles in subtropical southern China is reported for the first time at a record low latitude of 22°11'-22°21'N. The specimens were identified based on the COI gene sequence. The genetic composition between Japan and Hong Kong gnomefish populations were compared by sequencing the mitochondrial Cyt b gene, which showed no genetic differentiation. The juveniles ranged from 3.5-10.1 cm ( n = 40) in total length, with 35 individuals caught from Sargassum beds and five from rocky reefs. Our findings highlighted that the littoral habitats in Hong Kong waters, in particular the seasonal Sargassum beds, are important for small juveniles of S. boops .

Published
2021
Full Text
View/download PDF

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