Physiological responses of the invasive blue crabs Callinectes sapidus to salinity variations: Implications for adaptability and invasive success

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology, Journal Year: 2024, Volume and Issue: 297, P. 111709 - 111709

Published: July 23, 2024

This study provides a comprehensive analysis of the eco-physiological responses blue crab (Callinectes sapidus) to variations in salinity, shedding light on its adaptability and invasive success aquatic environments. Gender-specific differences osmoregulation Electron Transport System (ETS) activity highlight importance considering sex-specific aspects when understanding physiological species. Females exhibited increased ETS at lower salinities, potentially indicative metabolic stress, while males displayed constant across range salinities. Osmoregulatory capacity which depended gender was efficient within meso-polyhaline waters but decreased higher particularly males. These findings provide valuable understandings into how C. sapidus specimens an invaded area responds salinity changes, important for considerate distribution through saline pathways during tidal cycle fluctuations. shows interdisciplinary research effective management species conservation affected ecosystems.

Language: Английский

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Important but ignored: Research progress on crab foraging behaviour and its implications for aquaculture

Reviews in Aquaculture, Journal Year: 2024, Volume and Issue: 16(4), P. 1798 - 1818

Published: May 15, 2024

Abstract Crab fisheries play a crucial role in global fishery economics, but they heavily rely on wild catches. With the decline and exploratory limits of populations, expanding scale production aquaculture becomes vital for sustainability crab fisheries. The development encounters significant dietary challenges, stemming from suboptimal formulated feeds inefficient feeding management. Leveraging insights foraging behaviours offers promising solution to these issues; however, progress is hindered by lack comprehensive behavioural data underappreciation aquaculture. To bridge this gap, we systematically examine studies behaviour, analysing influences predators, prey, environmental characteristics, discuss possibilities future research field combining findings with demands This review identifies discrepancy focus, inadequate emphasis major cultured species their responses factors limiting productivity, aiming enhance our comprehension behaviour facilitate growth industry.

Language: Английский

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Intraspecific variation in the functional responses of an invasive tropical freshwater fish under increasing temperature regimes

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Nov. 18, 2024

Abstract Global warming and the introduction of non-native fish represent major threats to freshwater biodiversity worldwide, but their effects have usually been investigated separately. Since most are ectotherms, metabolism feeding behaviour highly influenced by temperature. Increasing water temperatures may thus exacerbate impact fish, particularly those adapted warmer conditions, on prey populations. temperature can also result in divergences between impacts females males, especially sexually dimorphic species. The globally invasive tropical guppy Poecilia reticulata Peters, a popular aquarium used for control mosquito-borne diseases as model species ecological evolutionary studies, exhibits strong sexual dimorphism larvivory. This laboratory study examined consumption size selection guppies fed with chironomid larvae under varying conditions. effect sex, pregnancy body guppy’s predatory response was assessed comparing Functional Responses. results highlighted four key points: (1) increased led both males decreasing handling time; (2) disproportionately higher than regardless temperature; (3) females’ selection; (4) reduced time among females. These findings show that intraspecific differences influence they should be taken into account when investigating predicting invaded food webs.

Language: Английский

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Substrate complexity reduces prey consumption in functional response experiments: Implications for extrapolating to the wild

NeoBiota, Journal Year: 2024, Volume and Issue: 91, P. 49 - 66

Published: Feb. 19, 2024

Understanding the density-dependent impacts of an invasive predator is integral for predicting potential consequences prey populations. Functional response experiments are used to assess rate consumption and a predator’s ability search consume at different resource densities. However, results can be highly context-dependent, limiting their extrapolation natural ecosystems. Here, we examined how simulated habitat complexity, through addition substrate in which escape predation, affects functional European green crabs ( Carcinus maenas ) foraging on two bivalve species. Green feeding varnish clams Nuttallia obscurata shifted from Type II hyperbolic absence density-independent when could bury. ate few Japanese littleneck Venerupis philippinarum under all densities, such that no curve any type produced total was always density independent. probability least one clam being consumed increased significantly with initial crab claw size across treatments. At mean compared trials without substrate, proportion were 4.2 times smaller present, but had negligible effect (1.2 times) littlenecks. The higher both conditions than littlenecks consumed; however, faster clams. Our suggest including environmental features variation species influence described by experiments. Incorporating replicable environment into imperative make more accurate predictions about impact predators

Language: Английский

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