The behavioral physiology of labroid fishes

Curran, Mary Carla

doi:10.1575/1912/5527

Cited by 4 publications

(1 citation statement)

References 102 publications

(194 reference statements)

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“…During autumn when water temperatures drop below~10°C, cunner prepare for overwintering by burying themselves in the substrate or hiding in rock crevices (Bradbury, Green & Bruce-Lockhart, 1995). During winter, cunner enter torpor as they experience a dramatic drop in metabolic rate which can be up to~75% less than the metabolic rate during summer (Haugaard & Irving, 1943;Curran, 1992;Kelly et al, 2014). As generalist feeders, cunner consume small crustaceans, mollusks and benthic invertebrates when not in torpor.…”

Section: Introductionmentioning

confidence: 99%

A temperate labrid fish demonstrates compensatory mechanisms to feed at torpor‐inducing temperatures

2018

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Temperature can have profound impacts on fitness‐related activities in fishes. Feeding is an ecologically relevant task which is controlled by muscle function. Consequently, in ectotherms, muscle function and feeding kinematics can be altered by temperature. This study investigated the effect of decreasing temperature on the feeding kinematics of the northern most labrid in the Western Atlantic. During winter, cunner (Tautogolabrus adspersus) enter a state of extended torpor in order to conserve energy when water temperatures drop below ~10°C. We hypothesized that feeding kinematics would be slower at lower temperatures especially those associated with torpor (≤10°C). Additionally, we hypothesized that prey type will elicit different feeding behaviors. Feeding events on sandworms and Asian shore crabs were recorded at 5, 10, 15 and 20°C. Fish held at 5°C had slower opening and closing jaw velocities while using more ram than the other temperature treatments. No differences were detected between prey types. For both prey types, the temperature treatment which consistently induced torpor (5°C) slowed oral jaw movements, which likely forced cunner to rely more on ram than suction to capture prey. Torpor temperatures appeared to have less of an effect on feeding than on metabolic rate, steady swimming capabilities and muscle function, suggesting some compensatory mechanisms of feeding musculature in cunner.

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Section: Introductionmentioning

confidence: 99%

A temperate labrid fish demonstrates compensatory mechanisms to feed at torpor‐inducing temperatures

2018

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Whole genome sequencing reveals fine-scale climate associated adaptive divergence near the range limits of a temperate reef fish

Nugent

Kess

Brachmann

et al. 2022

Preprint

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Adaptation to ocean climate is increasingly recognized as an important driver of diversity in marine species despite the lack of physical barriers to dispersal and the presence of pelagic stages in many taxa. A robust understanding of the genomic and ecological processes involved in structuring populations is lacking for most marine species, often hindering management and conservation action. Cunner (Tautogolabrus adspersus), is a temperate reef fish that displays both pelagic early life history stages and strong site-associated homing as adults; the species is also presently of interest for use as a cleaner fish in salmonid aquaculture in Atlantic Canada. Here we produce a chromosome-level genome assembly for cunner and characterize spatial population structure throughout Atlantic Canada using whole genome resequencing. The genome assembly spanned 0.72 Gbp and resolved 24 chromosomes; whole genome resequencing of 803 individuals from 20 locations spanning from Newfoundland to New Jersey identified approximately 11 million genetic variants. Principal component analysis revealed four distinct regional groups in Atlantic Canada, including three near the range edge in Newfoundland. Pairwise FST and selection scans revealed consistent signals of differentiation and selection at discrete genomic regions including adjacent peaks on chromosome 10 recurring across multiple pairwise comparisons (i.e., FST 0.5-0.75). Redundancy analysis suggested significant association of environmental variables related to benthic temperature and oxygen range with genomic structure, again highlighting the previously identified region on chromosome 10. Our results suggest that climate associated adaptation in this temperate reef fish drives regional diversity despite high early life history dispersal potential.

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Metabolic Depression in Cunner (Tautogolabrus adspersus) Is Influenced by Ontogeny, and Enhances Thermal Tolerance

et al. 2014

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To examine the effect of ontogeny on metabolic depression in the cunner (Tautogolabrus adspersus), and to understand how ontogeny and the ability to metabolically depress influence this species' upper thermal tolerance: 1) the metabolic rate of 9°C-acclimated cunner of three size classes [0.2–0.5 g, young of the year (YOY); 3–6 g, small; and 80–120 g, large (adult)] was measured during a 2°C per day decrease in temperature; and 2) the metabolic response of the same three size classes of cunner to an acute thermal challenge [2°C h−1 from 10°C until Critical Thermal Maximum, CTMax] was examined, and compared to that of the Atlantic cod (Gadus morhua). The onset-temperature for metabolic depression in cunner increased with body size, i.e. from 5°C in YOY cunner to 7°C in adults. In contrast, the extent of metabolic depression was ∼80% (Q10 = ∼15) for YOY fish, ∼65% (Q10 = ∼8) for small fish and ∼55% (Q10 = ∼5) for adults, and this resulted in the metabolic scaling exponent (b) gradually increasing from 0.84 to 0.92 between 9°C to 1°C. All size classes of cunner had significantly (approximately 60%) lower routine metabolic rates at 10°C than Atlantic cod. However, there was no species' difference in the temperature-induced maximum metabolic rate, and this resulted in factorial metabolic scope values that were more than two-fold greater for cunner, and CTMax values that were 6–9°C higher (∼21 vs. 28°C). These results: 1) show that ontogeny influences the temperature of initiation and the extent of metabolic depression in cunner, but not O2 consumption when in a hypometabolic state; and 2) suggest that the evolution of cold-induced metabolic depression in this northern wrasse species has not resulted in a trade-off with upper thermal tolerance, but instead, an enhancement of this species' metabolic plasticity.

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The behavioral physiology of labroid fishes

Cited by 4 publications

References 102 publications

A temperate labrid fish demonstrates compensatory mechanisms to feed at torpor‐inducing temperatures

A temperate labrid fish demonstrates compensatory mechanisms to feed at torpor‐inducing temperatures

Whole genome sequencing reveals fine-scale climate associated adaptive divergence near the range limits of a temperate reef fish

Metabolic Depression in Cunner (Tautogolabrus adspersus) Is Influenced by Ontogeny, and Enhances Thermal Tolerance

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