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Age, Growth and Reproduction of Coryphaena hippurus (Linnaeus, 1758) in Maltese Waters, Central Mediterranean
doi: 10.12681/mms.706
Age, growth and reproduction of the dolphinfish Coryphaena hippurus Linnaeus, 1758 collected from the Central Mediterranean in the period 2004-2010 by the traditional Maltese fish aggregating devices (FAD) and surface longline fisheries were studied. The a and b parameters of the length-weight relationship for fish 11-142 cm fork length (FL) (n = 4042) were determined as a = 0.018 and 0.022 with b = 2.85 and 2.79, for males and females respectively. The counting of annual increments from dorsal spines of >65 cm FL dolphinfish at X25 magnification (n = 47) permitting an age reading resolution in years, and the counting of daily increments from sagittal otoliths of <65 cm FL dolphinfish at X400 magnification (n = 583) permitting an age reading resolution in days, were estimated; the von Bertalanffy growth model applied to these fish gave the following parameters: L∞ = 107.8 cm FL and 120.2 cm FL, and K = 1.9 yr-1 and 1.56 yr-1, for males and females respectively. The maximum age observed was 2 years. Size at 50% maturity for fish 10-131 cm FL (n = 1376) was 58.9 cm FL and 62.5 cm FL for males and females, respectively. The sex ratio for the fish sampled from the FAD fishery (10.5-131 cm FL) was 1:1.54 (M:F) and for dolphinfish sampled from the surface longline fishery (91-130 cm FL) was 1:0.76 (M:F). Back-calculated hatch dates from age-0 dolphinfish (n = 518) suggested that spawning occurs from June to September with the highest levels in June. This study is the first to use dorsal spines to determine the age of adult dolphinfish
peer-reviewed
- University of Malta Malta
Microsoft Academic Graph classification: Dorsum Mediterranean climate media_common.quotation_subject Von bertalanffy Fish measurement Animal science media_common Coryphaena biology Growth model biology.organism_classification Reproduction Sex ratio
Library of Congress Subject Headings: lcsh:Aquaculture. Fisheries. Angling lcsh:SH1-691
Environmental Engineering, Coryphaena hippurus -- Malta, SH1-691, Dolphinfishes, Aquatic Science, Oceanography, Coryphaena hippurus, Malta, age determination, von Bertalanffy, growth model, otoliths, dorsal spines., Aquaculture. Fisheries. Angling, Ecology, Evolution, Behavior and Systematics, Coryphaena hippurus, Malta, dorsal spines., age determination, von Bertalanffy, Otoliths -- Malta, otoliths, growth model
Environmental Engineering, Coryphaena hippurus -- Malta, SH1-691, Dolphinfishes, Aquatic Science, Oceanography, Coryphaena hippurus, Malta, age determination, von Bertalanffy, growth model, otoliths, dorsal spines., Aquaculture. Fisheries. Angling, Ecology, Evolution, Behavior and Systematics, Coryphaena hippurus, Malta, dorsal spines., age determination, von Bertalanffy, Otoliths -- Malta, otoliths, growth model
Microsoft Academic Graph classification: Dorsum Mediterranean climate media_common.quotation_subject Von bertalanffy Fish measurement Animal science media_common Coryphaena biology Growth model biology.organism_classification Reproduction Sex ratio
Library of Congress Subject Headings: lcsh:Aquaculture. Fisheries. Angling lcsh:SH1-691
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).12 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).12 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average Powered byBIP!