{"title":"路易斯安那州野生捕捞小龙虾的历史和生态学","authors":"Mahala G. Gambill, S. R. Midway","doi":"10.1002/nafm.11002","DOIUrl":null,"url":null,"abstract":"The lower Mississippi River floodplain has historically been harvested for wild crawfish since the 1800s. Changes in seasonal hydrology align with the life history of the red swamp crawfish Procambarus clarkii and the white river crawfish P. zonangulus, making them primary targets for commercial and recreational harvesters. The goal of this study was to use over 20 years of long‐term data from Louisiana to evaluate the association of river stage and local precipitation with crawfish harvest.Crawfish landings data from 1999 to 2022, in addition to monthly Atchafalaya River stage height and monthly precipitation, were used to evaluate potential (delayed) effects of the environmental variables across a range of months.Annual wild crawfish landings averaged 5 million kg at a value of US$10 million, with 90% of statewide landings historically from the Atchafalaya River basin. We found two clusters of the effect of river stage on crawfish landings: (1) late‐fall (November and December) river stage significantly increased the early crawfish season (February) landings; and (2) winter (January and February) river stage significantly increased the March and April crawfish landings. Precipitation was only found to have an effect in one monthly combination.The wild crawfish fishery is viewed as an annual crop with little regulation, and this status may continue into the future. However, we have now quantified the effects of environmental variables associated with harvest, providing a deeper understanding of the river–crawfish relationship. These results may assist the future management of crawfish if harvest increases or if the river system experiences extreme (flow) conditions.","PeriodicalId":19263,"journal":{"name":"North American Journal of Fisheries Management","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"History and ecology of wild‐captured crawfish in Louisiana\",\"authors\":\"Mahala G. Gambill, S. R. Midway\",\"doi\":\"10.1002/nafm.11002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The lower Mississippi River floodplain has historically been harvested for wild crawfish since the 1800s. Changes in seasonal hydrology align with the life history of the red swamp crawfish Procambarus clarkii and the white river crawfish P. zonangulus, making them primary targets for commercial and recreational harvesters. The goal of this study was to use over 20 years of long‐term data from Louisiana to evaluate the association of river stage and local precipitation with crawfish harvest.Crawfish landings data from 1999 to 2022, in addition to monthly Atchafalaya River stage height and monthly precipitation, were used to evaluate potential (delayed) effects of the environmental variables across a range of months.Annual wild crawfish landings averaged 5 million kg at a value of US$10 million, with 90% of statewide landings historically from the Atchafalaya River basin. We found two clusters of the effect of river stage on crawfish landings: (1) late‐fall (November and December) river stage significantly increased the early crawfish season (February) landings; and (2) winter (January and February) river stage significantly increased the March and April crawfish landings. Precipitation was only found to have an effect in one monthly combination.The wild crawfish fishery is viewed as an annual crop with little regulation, and this status may continue into the future. However, we have now quantified the effects of environmental variables associated with harvest, providing a deeper understanding of the river–crawfish relationship. These results may assist the future management of crawfish if harvest increases or if the river system experiences extreme (flow) conditions.\",\"PeriodicalId\":19263,\"journal\":{\"name\":\"North American Journal of Fisheries Management\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2024-06-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"North American Journal of Fisheries Management\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1002/nafm.11002\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"FISHERIES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"North American Journal of Fisheries Management","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1002/nafm.11002","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"FISHERIES","Score":null,"Total":0}
History and ecology of wild‐captured crawfish in Louisiana
The lower Mississippi River floodplain has historically been harvested for wild crawfish since the 1800s. Changes in seasonal hydrology align with the life history of the red swamp crawfish Procambarus clarkii and the white river crawfish P. zonangulus, making them primary targets for commercial and recreational harvesters. The goal of this study was to use over 20 years of long‐term data from Louisiana to evaluate the association of river stage and local precipitation with crawfish harvest.Crawfish landings data from 1999 to 2022, in addition to monthly Atchafalaya River stage height and monthly precipitation, were used to evaluate potential (delayed) effects of the environmental variables across a range of months.Annual wild crawfish landings averaged 5 million kg at a value of US$10 million, with 90% of statewide landings historically from the Atchafalaya River basin. We found two clusters of the effect of river stage on crawfish landings: (1) late‐fall (November and December) river stage significantly increased the early crawfish season (February) landings; and (2) winter (January and February) river stage significantly increased the March and April crawfish landings. Precipitation was only found to have an effect in one monthly combination.The wild crawfish fishery is viewed as an annual crop with little regulation, and this status may continue into the future. However, we have now quantified the effects of environmental variables associated with harvest, providing a deeper understanding of the river–crawfish relationship. These results may assist the future management of crawfish if harvest increases or if the river system experiences extreme (flow) conditions.
期刊介绍:
The North American Journal of Fisheries Management promotes communication among fishery managers with an emphasis on North America, and addresses the maintenance, enhancement, and allocation of fisheries resources. It chronicles the development of practical monitoring and management programs for finfish and exploitable shellfish in marine and freshwater environments.
Contributions relate to the management of fish populations, habitats, and users to protect and enhance fish and fishery resources for societal benefits. Case histories of successes, failures, and effects of fisheries programs help convey practical management experience to others.