Effects of catching method on different quality parameters of Baltic herring (Clupea harengus L.)

Hattula, Tapani; Luoma, Tiina; Kostiainen, Rauno; Poutanen, Jouko; Kallio, Marja; Suuronen, Petri

doi:10.1016/0165-7836(94)00358-4

Cited by 25 publications

(27 citation statements)

References 10 publications

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“…However, the catches in this were rather small (Table 1). Wagner [18] reported that in his study the quality of the cod, expressed as external appearance and consistency, deteriorated as trawling time and catch size increased, while Hattula et al [6] did not find any effect of catch size (100-3,500 kg) on the quality of herring. However, in both of these studies, the shorter the duration of the trawling, the larger the proportion of fish alive after being caught.…”

Section: Discussionmentioning

confidence: 97%

“…Furthermore, muscle pH is lower and the condition factor is generally higher in fish caught by gillnet compared with fish caught by longline [19]. Hattula et al [6] studied the effect of gillnetting, poundnetting and trawling on the mortality and quality of herring. Mortality increased when the trawling time increased from 2 to 5 h. Rigor mortis started earlier, and the nucleotide decomposition proceeded further in gillnet-caught fish than in fish caught by the other methods, indicating a loss of freshness due to stress in the catching process.…”

Section: Introductionmentioning

confidence: 98%

“…Although not widely studied, it has nevertheless been shown that catching methods and subsequent onboard handling may affect fish quality [1][2][3][4][5][6][7][8]. The fish are often exhausted, injured or killed as a result of inadequate catching methods, transfer from sea-to-vessel methods, or on-deck handling routines.…”

Section: Introductionmentioning

confidence: 99%

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Effect of trawling with traditional and ‘T90’ trawl codends on fish size and on different quality parameters of cod Gadus morhua and haddock Melanogrammus aeglefinus

2010

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The effect of trawling on fish size and on different quality parameters of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) was evaluated after conducting 16 valid hauls using two trawls in a double rig fitted with a traditional and a novel 'T90' codend, respectively. The total catch volume during the fishing period was 47.6 metric tons, with an average catch per codend of 1.5 (range 0.5-2.9) tons. The mean haul duration was 5 h. The catch was assessed according to fish size, mortality, external damage, initial white muscle pH and development of rigor mortis. Fillet quality (colour, blood spots, gaping) was assessed after 1 week of freeze-storage. Our results showed there was no difference between the two types of nets in terms of catch volume, but significantly slightly bigger fish were caught with T90 than with the traditional trawl net (p \ 0.05). Haddock caught with the traditional trawl net had more external injuries related to the trawl gear than haddock caught with the T90 gear (p \ 0.05). The gaping frequency for cod caught with the traditional trawl net tended to be higher than cod caught with the T90 gear, but the difference was not significant (p = 0.07). No other differences in fish quality between fish caught in the trawl nets were observed.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

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Effect of trawling with traditional and ‘T90’ trawl codends on fish size and on different quality parameters of cod Gadus morhua and haddock Melanogrammus aeglefinus

2010

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“…The results showed that catching methods had greater impact than season on the quality of fresh cod. Hattula et al (1995) studied the effect of gillnetting, poundnetting and trawling on mortality and quality of herring. Mortality increased when the trawling time increased from 2 to 5 h. Since rigor mortis started earlier with fish caught by gillnet, this indicated that gillnet was the most stressful catching method.…”

Section: Effect Of Catching Methods and On Board Handling Systems On mentioning

confidence: 99%

The pelagic Complex in the North East Atlantic Ocean

2011

TemaNord

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“…The first outcome indicator for this issue concerns the vessel's average amount of catch per haul in the past year as a percentage of this vessel's maximum capacity per haul. This indicator concerns crowding in the nets, which is likely to have a detrimental effect on fish welfare (Hattula et al, 1995). The rubric for this indicator is based on a linear distribution of percentages across rubric scores (Table 3.6).…”

Section: Issue Category 'Fish Welfare'mentioning

confidence: 99%

Understanding social sustainability of capture fisheries

Boer¹,

Berentsen²,

Bokkers³

et al.

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Fishing companies are faced with decreasing profitability and increasing competition. These companies can try to gain a competitive advantage by differentiating their products, e.g. by marketing new product attributes that consumers are interested in such as attributes relating to sustainability. Although consumers could be considerably interested in social sustainability of fish, this sustainability dimension has received little research interest so far. The main objective of this thesis is to understand social sustainability of capture fisheries. Social sustainability can be understood by applying the framework for social sustainability assessment, which consists of stakeholder consultation and issue selection, indicator development and quantification, and interpretation of the results, to the case considered. The case considered in this thesis was capture fisheries in the northeast Atlantic. Stakeholder consultation resulted in the identification of 27 social sustainability issues relevant for capture fisheries in the northeast Atlantic. Overall, social sustainability issues concerning working conditions, employees' job fulfilment and fish welfare were seen as more important than other social sustainability issues. Indicators were defined for the most important social sustainability issues of capture fisheries in the northeast Atlantic. To interpret values for each indicator, rubrics were developed that articulated levels of performance. Application of these indicators and their accompanying rubrics to a Norwegian trawler demonstrated that the indicators and rubrics provide insight into social sustainability at the level of the vessel, which can be used to identify potential room for improvement. To determine whether social sustainability issues can be used for product differentiation, consumer interest in social sustainability issues of whitefish from the northeast Atlantic was studied. Results from a choice modelling survey demonstrated that consumers prefer the issue fish welfare over the issues product quality, worker safety and local employment. Given the lack of overview of the knowledge on fish welfare, the most important social sustainability issue for consumers, the literature on this topic was reviewed to determine how the capture process in capture fisheries affects fish welfare, using the indicators external injuries and mortality. This review showed that scale, skin and fin injuries occur more frequently in trawls, purse seines, gillnets, traps and seines than in hooks, whereas hooking injuries occur in hooks only. Pressure injuries can occur in all gear types when deployed at greater depth. Trawls, purse seines and seines result in higher mortality than gillnets, hooks and traps. Mortality appears to increase with decreasing fish length, and differs across fish species. A greater capture depth and a longer fishing duration were associated with more external injuries and higher mortality, whereas a large change in water temperature, a longer duration of air exposure and a high density in ...

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Effects of catching method on different quality parameters of Baltic herring (Clupea harengus L.)

Cited by 25 publications

References 10 publications

Effect of trawling with traditional and ‘T90’ trawl codends on fish size and on different quality parameters of cod Gadus morhua and haddock Melanogrammus aeglefinus

Effect of trawling with traditional and ‘T90’ trawl codends on fish size and on different quality parameters of cod Gadus morhua and haddock Melanogrammus aeglefinus

The pelagic Complex in the North East Atlantic Ocean

Understanding social sustainability of capture fisheries

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