Characterizing the biological traits and life history of <i>Acanthopagrus</i> (Sparidae) hybrid complexes: implications for conservation and management

Ochwada‐Doyle, Faith A.; Roberts, David G.; Gray, Charles A.; Barnes, Lachlan M.; Haddy, James; Fearman, J.

doi:10.1111/j.1095-8649.2012.03401.x

Cited by 12 publications

(7 citation statements)

References 59 publications

(92 reference statements)

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“…As temperature averaged across the spawning season was more strongly associated with growth than the other two time periods, it also suggests that growth is more responsive to temperature during this time. Acanthopagrus hybrid complexes in southern New South Wales, composed of black bream and yellowfin bream (Acanthopagrus australis), also appear to have a more prolonged spawning season (August-January) relative to higher-latitude hybrid and pure black bream populations (Ochwada-Doyle et al 2012). Although the reason for this is unknown, it may relate to geographical differences in temperature, which plays an important role in the onset and cessation of spawning in the species (Haddy J.A., unpublished data).…”

Section: Discussionmentioning

confidence: 98%

Long-term patterns in estuarine fish growth across two climatically divergent regions

et al. 2015

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Long-term ecological datasets are vital for investigating how species respond to changes in their environment, yet there is a critical lack of such datasets from aquatic systems. We developed otolith growth 'chronologies' to reconstruct the growth history of a temperate estuarine fish species, black bream (Acanthopagrus butcheri). Chronologies represented two regions in south-east Australia: South Australia, characterised by a relatively warm, dry climate, and Tasmania, characterised by a relatively cool, wet climate. Using a mixed modelling approach, we related inter-annual growth variation to air temperature, rainfall, freshwater inflow (South Australia only), and El Niño-Southern Oscillation events. Otolith chronologies provided a continuous record of growth over a 13- and 21-year period for fish from South Australia and Tasmania, respectively. Even though fish from Tasmania were sourced across multiple estuaries, they showed higher levels of growth synchronicity across years, and greater year-to-year growth variation, than fish from South Australia, which were sourced from a single, large estuary. Growth in Tasmanian fish declined markedly over the time period studied and was negatively correlated to temperature. In contrast, growth in South Australian fish was positively correlated to both temperature and rainfall. The stark contrast between the two regions suggests that Tasmanian black bream populations are more responsive to regional scale environmental variation and may be more vulnerable to global warming. This study highlights the importance of examining species response to climate change at the intra-specific level and further validates the emerging use of growth chronologies for generating long-term ecological data in aquatic systems.

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Section: Discussionmentioning

confidence: 98%

Long-term patterns in estuarine fish growth across two climatically divergent regions

et al. 2015

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“…When a growth strategy and its assumptions form the foundations of further theoretical work and conservation efforts [ 25 ], incorrectly classifying growth in such a way can potentially impact future life-history research and even the long-term success of a species. Determining how a species grows and when it is likely to reproduce allows more effective management of populations [ 26 – 28 ]. Discerning which growth strategy these potentially misclassified species follow is therefore critical to avoid at best confusion and at worst misdirection.…”

Section: Introductionmentioning

confidence: 99%

Distinguishing between determinate and indeterminate growth in a long-lived mammal

et al. 2015

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BackgroundThe growth strategy of a species influences many key aspects of its life-history. Animals can either grow indeterminately (throughout life), or grow determinately, ceasing at maturity. In mammals, continued weight gain after maturity is clearly distinguishable from continued skeletal growth (indeterminate growth). Elephants represent an interesting candidate for studying growth because of their large size, long life and sexual dimorphism. Objective measures of their weight, height and age, however, are rare.ResultsWe investigate evidence for indeterminate growth in the Asian elephant Elephas maximus using a longitudinal dataset from a semi-captive population. We fit growth curves to weight and height measurements, assess sex differences in growth, and test for indeterminate growth by comparing the asymptotes for height and weight curves. Our results show no evidence for indeterminate growth in the Asian elephant; neither sex increases in height throughout life, with the majority of height growth completed by the age of 15 years in females and 21 years in males. Females show a similar pattern with weight, whereas males continue to gain weight until over age 50. Neither sex shows any declines in weight with age.ConclusionsThese results have implications for understanding mammalian life-history, which could include sex-specific differences in trade-offs between size and reproductive investment.Electronic supplementary materialThe online version of this article (doi:10.1186/s12862-015-0487-x) contains supplementary material, which is available to authorized users.

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“…As most of the sparid fishes, A. bifasciatus is characterized by long lifespan and slow rate of growth [7,19]. The long lifespan was recorded for Oceanography & Fisheries Open access Journal a number of Achanthopagrus species (i.e., 24 for A. latus; 17 for A. berda; up to 21 for A. butcheri; 29 and 31 for Acanthopagrus hybrid complexes; 28 for A. schlegelii) [19,[20][21][22].…”

Section: Discussionmentioning

confidence: 99%

Fisheries Biology of the twobar Seabream, Acanthopagrus bifasciatus from the Egyptian Sector of the Red Sea

Osman¹

2021

OFOAJ

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The growth and reproductive biology of the commercially important reef fish, the twobar seabream, Acanthopagrus bifasciatus, were investigated in order to evaluate the impact of fishing on its resource, and to derive information required for its management in the Red Sea. Samples were collected during 2017-2019 from Hurgada fishing harbor. Age was determined by using sagittal otolith. The maximum age recorded was 18 years. The von Bertalanffy growth parameters fit to length at age data were estimated as K = 0.131 year−1, L ∞ = 59.48 cm (TL), t o = −1.778 years. The length-weight relationship for combined sexes was represented by the equation, W=0.0135*L 3.1112 which exhibit positive allometric growth. Spawning was recorded during January and February, and the mean sizes and ages at first sexual maturity were 27.2 cm (2.9 years) for males and 30.1 cm (3.6 years) for females. Sex ratio was (females 50.5%, males 48.4% and hermaphrodites 1.1%). Sex ratio by size indicated that females were dominant among small/young fishes while males were dominant among old/large fishes. This suggested a protogynous hermaphrodite life history style, which may be widespread in Acanthopagrus species. The rate of fishing mortality (F cur = 0.238) exceeded the target (F opt = 0.121), and the limit reference points (F limit = 0.161). Further expansion of the fishery should be constrained.

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Characterizing the biological traits and life history of Acanthopagrus (Sparidae) hybrid complexes: implications for conservation and management

Cited by 12 publications

References 59 publications

Long-term patterns in estuarine fish growth across two climatically divergent regions

Long-term patterns in estuarine fish growth across two climatically divergent regions

Distinguishing between determinate and indeterminate growth in a long-lived mammal

Fisheries Biology of the twobar Seabream, Acanthopagrus bifasciatus from the Egyptian Sector of the Red Sea

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