Sardine (Sardina pilchardus) stress reactions to purse seine fishing

Marçalo, Ana; Mateus, L.; Correia, José Henrique Duarte; Serra, Pedro; Fryer, R. J.; Stratoudakis, Yorgos

doi:10.1007/s00227-006-0277-5

Cited by 39 publications

(62 citation statements)

References 28 publications

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“…Davis (2002) suggested that the complexity of the task means that the problem of fishery-dependent unaccounted mortality would best be addressed through a combination of laboratory investigations and field experiments under realistic fishing conditions, as has been successfully done with sardine (Març alo et al, 2006(Març alo et al, , 2007(Març alo et al, , 2010. The key stressors can then be studied individually as well as in interaction.…”

Section: Discussionmentioning

confidence: 98%

“…This is particularly the case when there is a large price differential among fish sizes or qualities (high grading). Until now, little has been known about how pelagic fish are affected by contact with fishing gears, although some studies of herring (Misund and Beltestad, 1995;Suuronen et al, 1996a,b), mackerel (Misund and Beltestad, 2000) and sardine (Març alo et al, 2006(Març alo et al, , 2007(Març alo et al, , 2010 suggest that these species are highly vulnerable to gear-inflicted injury. ICES has called attention to the fact that landed catches alone do not explain the total loss from the stock of NE Atlantic mackerel (ICES, 2007).…”

Section: Introductionmentioning

confidence: 97%

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Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine

Huse

Vold

2010

Fisheries Research

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Havforskningsinstituttets institusjonelle arkiv Brage IMR - Institutional repository of the Institute of Marine Research b r a g e i m rDette er forfatters siste versjon av den fagfellevurderte artikkelen, vanligvis omtalt som postprint. I Brage IMR er denne artikkelen ikke publisert med forlagets layout fordi forlaget ikke tillater dette. Du finner lenke til forlagets versjon i Brage-posten. Det anbefales at referanser til artikkelen hentes fra forlagets side. Ved lenking til artikkelen skal det lenkes til post i Brage IMR, ikke direkte til pdf-fil.This is the author's last version of the article after peer review and is not the publisher's version, usually referred to as postprint. You will find a link to the publisher's version in Brage IMR. It is recommended that you obtain the references from the publisher's site.Linking to the article should be to the Brage-record, not repeat experiments were performed, all of which showed that crowding has a major 23 effect on survival rates. In all five experiments, mortality was higher among the 24 crowded fish (80 -100 % mortality) than the controls (0.1 -46 % mortality), and the 25 difference was significant (p = 0.01). The experiments demonstrate that excessive 26 crowding before slipping mackerel from purse seines should be avoided, if possible, 27 in order to avoid massive fish kills. 28 29

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine

Huse

Vold

2010

Fisheries Research

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“…In purse seine fisheries whole or parts of the catch may be slipped (released from the purse seine) when fish are undersized, shoals are too large or the hold capacity of the vessel or the quota is exceeded (Stratoudakis and Març alo, 2002;Març alo et al, 2006;Huse and Vold, 2010). Before slipping however, fish in the purse seine will be subjected to various degrees of crowding.…”

Section: Introductionmentioning

confidence: 97%

Physiological response and mortality caused by scale loss in Atlantic herring

et al. 2012

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a b s t r a c tSlipping of crowded herring (Clupea harengus) from purse seines may lead to high mortalities. We suggest that scale loss during crowding may be one reason for the mortalities. To test this hypothesis, herring were transferred to 5 m tanks and subsequently de-scaled on 25% or 50% of the body surface. Recovery was monitored for mortality (over 7 days), behavior (days 1 and 2) and blood metabolites (days 0, 1, 2, 4 and 7). Most mortalities occurred between 1 and 4 days post treatment and increased with the degree of de-scaling reaching 60% in worst cases. Larger fish with good condition had better survival than smaller fish. Many de-scaled fish increased their swimming speed significantly. Some also deviated from the normal schooling behavior swimming with the current rather than against it. De-scaling led to loss of osmoregulatory ability and presumably water loss as seen through increases in plasma ions and osmolality. Plasma glucose was reduced in de-scaled fish while plasma levels of cortisol and lactate were increased. An apparent bimodal response was observed in the blood data. While some fish recovered and returned to pre-treatment levels for most parameters within days, others were unable to recover. It is concluded that de-scaling may lead to mortality in herring. The mortality appears to be related to fish condition, loss of osmoregulation and increased stress response and energy expenditure. Altered behavior may contribute to the mortality.

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“…However, there are a limited number of studies assessing the response of blood parameters of marine pelagic and schooling species to stressful conditions. For instance, Marçalo et al (2006Marçalo et al ( , 2008 found that the European sardine (Sardina pilchardus) exhibited increasing cortisol and glucose levels after being exposed to purse seine fishing and captivity.…”

Section: Introductionmentioning

confidence: 98%

Evaluation of the physiological status of the Pacific sardine, Sardinops sagax caeruleus, acclimated to different thermal regimes based on selected blood parameters

et al. 2010

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Despite the widespread recognition of the importance of temperature in the population dynamics and distribution of Pacific sardine (Sardinops sagax caeruleus), few studies have examined the species' physiological response to temperature under controlled conditions. The effect of fluctuating thermal regimes on blood plasma cortisol, glucose, aspartate aminotransferase (ALT), alanine aminotransferase (AST) and red blood cell (RBC) counts of Pacific sardine was evaluated to monitor physiological response. Sardines from the southern subpopulation that inhabits waters off Baja California, Mexico, were collected during fall 2008. Acclimation to four fluctuating temperature regimes (two symmetric and two asymmetric) and a constant, optimal temperature occurred over 20 d. Symmetric and asymmetric regimes were designed to simulate regional summer (18-23°C) and winter (13-18°C) temperature ranges within 24 h. In the optimal regime (OR), sardines were acclimated to 18°C. In symmetric regimes, sardines were exposed for 7 h to the high and low temperatures, while in asymmetric regimes exposure to the high temperature was shorter (4 vs.10 h). Blood sampling took place during the low and high temperature exposure, and we tested for differences in blood parameters compared to OR. Plasma cortisol and glucose concentration of sardines from summer regimes were only significantly higher at 23°C. AST activities were significantly higher than OR during the high and low temperatures of both summer treatments. No differences were found in individuals exposed to the winter regimes. ALT activities were significantly higher than OR only during the high and low temperature of the symmetric summer regime. RBC were significantly higher than OR for both summer regimes. Sardines from southern subpopulation exhibit a negative physiological response to high temperatures, yet they can acclimate to the lower (≤18°C) temperatures typical of the California Current Environ Biol Fish (2011) 91:39-49

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Sardine (Sardina pilchardus) stress reactions to purse seine fishing

Cited by 39 publications

References 28 publications

Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine

Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine

Physiological response and mortality caused by scale loss in Atlantic herring

Evaluation of the physiological status of the Pacific sardine, Sardinops sagax caeruleus, acclimated to different thermal regimes based on selected blood parameters

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