A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae
A biochemically based model was developed to simulate the growth, development, and metamorphosis of larvae of the Pacific oyster (Crassostrea gigas). The unique characteristics of the model are that it: (1) defines larvae in terms of their protein, neutral lipid, polar lipid, carbohydrate, and ash c...
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Format: | Article in Journal/Newspaper |
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ODU Digital Commons
2004
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Online Access: | https://digitalcommons.odu.edu/ccpo_pubs/261 https://doi.org/10.1016/j.icesjms.2004.03.029 https://digitalcommons.odu.edu/context/ccpo_pubs/article/1265/viewcontent/Hofmann_2004_A_modelling_study_of_the_influenc.pdf |
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ftolddominionuni:oai:digitalcommons.odu.edu:ccpo_pubs-1265 2023-12-17T10:29:04+01:00 A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae Hofmann, Eileen E. Powell, Eric N. Bochenek, Eleanor A. Klinck, John M. 2004-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/ccpo_pubs/261 https://doi.org/10.1016/j.icesjms.2004.03.029 https://digitalcommons.odu.edu/context/ccpo_pubs/article/1265/viewcontent/Hofmann_2004_A_modelling_study_of_the_influenc.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/ccpo_pubs/261 doi:10.1016/j.icesjms.2004.03.029 https://digitalcommons.odu.edu/context/ccpo_pubs/article/1265/viewcontent/Hofmann_2004_A_modelling_study_of_the_influenc.pdf Web of Science: "Free full-text from publisher." CCPO Publications Crassostrea gigas larvae Bivalve larvae models Food quality Aquaculture and Fisheries Marine Biology Oceanography article 2004 ftolddominionuni https://doi.org/10.1016/j.icesjms.2004.03.029 2023-11-20T19:09:54Z A biochemically based model was developed to simulate the growth, development, and metamorphosis of larvae of the Pacific oyster (Crassostrea gigas). The unique characteristics of the model are that it: (1) defines larvae in terms of their protein, neutral lipid, polar lipid, carbohydrate, and ash content; (2) tracks weight separately from length to follow larval condition; and (3) includes genetic variation in growth efficiency and egg quality to better simulate cohort population dynamics. The model includes parameterizations for filtration, ingestion, and respiration, which determine larval growth rate, and processes controlling larval mortality and metamorphosis. Changes in larval tissue composition occur as the larva grows and in response to the biochemical composition of the food. Simulations of larval growth indicate that departures of temperature, salinity, or food content from optimum levels reduce larval cohort survival, either because of metabolic constraints that result in death, unsuccessful metamorphosis, or increased predation resulting from increased larval lifespan. Temperatures and salinities near optimal values improve larval survival at low food concentration by increasing ingestion rate or growth efficiency. Also, survival at a given food concentration can vary widely depending on food composition, which determines food quality. The simulations suggest that the ratio of carbohydrate + lipid-to-protein may best describe the overall food quality, with optimal food compositions being characterized by ratios near 1.2 to 1.4 over a range of food concentrations. In contrast, food compositions containing too much or too little protein reduce larval survival, even at saturating food concentrations. In simulations emphasizing genetic variability within the cohort, larvae with high growth efficiency originating from large eggs out-perform other egg quality-growth efficiency combinations over a wide range of temperature, salinity, and food contents. As a consequence, suboptimal temperature, salinity, or ... Article in Journal/Newspaper Crassostrea gigas Pacific oyster Old Dominion University: ODU Digital Commons Pacific ICES Journal of Marine Science 61 4 596 616 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Crassostrea gigas larvae Bivalve larvae models Food quality Aquaculture and Fisheries Marine Biology Oceanography |
spellingShingle |
Crassostrea gigas larvae Bivalve larvae models Food quality Aquaculture and Fisheries Marine Biology Oceanography Hofmann, Eileen E. Powell, Eric N. Bochenek, Eleanor A. Klinck, John M. A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae |
topic_facet |
Crassostrea gigas larvae Bivalve larvae models Food quality Aquaculture and Fisheries Marine Biology Oceanography |
description |
A biochemically based model was developed to simulate the growth, development, and metamorphosis of larvae of the Pacific oyster (Crassostrea gigas). The unique characteristics of the model are that it: (1) defines larvae in terms of their protein, neutral lipid, polar lipid, carbohydrate, and ash content; (2) tracks weight separately from length to follow larval condition; and (3) includes genetic variation in growth efficiency and egg quality to better simulate cohort population dynamics. The model includes parameterizations for filtration, ingestion, and respiration, which determine larval growth rate, and processes controlling larval mortality and metamorphosis. Changes in larval tissue composition occur as the larva grows and in response to the biochemical composition of the food. Simulations of larval growth indicate that departures of temperature, salinity, or food content from optimum levels reduce larval cohort survival, either because of metabolic constraints that result in death, unsuccessful metamorphosis, or increased predation resulting from increased larval lifespan. Temperatures and salinities near optimal values improve larval survival at low food concentration by increasing ingestion rate or growth efficiency. Also, survival at a given food concentration can vary widely depending on food composition, which determines food quality. The simulations suggest that the ratio of carbohydrate + lipid-to-protein may best describe the overall food quality, with optimal food compositions being characterized by ratios near 1.2 to 1.4 over a range of food concentrations. In contrast, food compositions containing too much or too little protein reduce larval survival, even at saturating food concentrations. In simulations emphasizing genetic variability within the cohort, larvae with high growth efficiency originating from large eggs out-perform other egg quality-growth efficiency combinations over a wide range of temperature, salinity, and food contents. As a consequence, suboptimal temperature, salinity, or ... |
format |
Article in Journal/Newspaper |
author |
Hofmann, Eileen E. Powell, Eric N. Bochenek, Eleanor A. Klinck, John M. |
author_facet |
Hofmann, Eileen E. Powell, Eric N. Bochenek, Eleanor A. Klinck, John M. |
author_sort |
Hofmann, Eileen E. |
title |
A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae |
title_short |
A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae |
title_full |
A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae |
title_fullStr |
A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae |
title_full_unstemmed |
A Modelling Study of the Influence of Environment and Food Supply on Survival of Crassostrea gigas Larvae |
title_sort |
modelling study of the influence of environment and food supply on survival of crassostrea gigas larvae |
publisher |
ODU Digital Commons |
publishDate |
2004 |
url |
https://digitalcommons.odu.edu/ccpo_pubs/261 https://doi.org/10.1016/j.icesjms.2004.03.029 https://digitalcommons.odu.edu/context/ccpo_pubs/article/1265/viewcontent/Hofmann_2004_A_modelling_study_of_the_influenc.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
CCPO Publications |
op_relation |
https://digitalcommons.odu.edu/ccpo_pubs/261 doi:10.1016/j.icesjms.2004.03.029 https://digitalcommons.odu.edu/context/ccpo_pubs/article/1265/viewcontent/Hofmann_2004_A_modelling_study_of_the_influenc.pdf |
op_rights |
Web of Science: "Free full-text from publisher." |
op_doi |
https://doi.org/10.1016/j.icesjms.2004.03.029 |
container_title |
ICES Journal of Marine Science |
container_volume |
61 |
container_issue |
4 |
container_start_page |
596 |
op_container_end_page |
616 |
_version_ |
1785581348204838912 |