NAFO fishing division 4T Herring Spawning Grounds Acoustic Survey

NAFO fishing division 4T Herring Spawning Grounds Acoustic Survey In 2015, a spawning ground acoustic survey that follows the design of the fishery-independent acoustic survey was initiated. This survey is the result of a partnership between DFO and fishery associations. The survey design uses random parallel transects within predefined strata. Surveys are conducted by fishermen in the fall fishing season according to protocols developed by DFO. The survey is conducted at night, during the weekend fishery closures except in Herring fishing area 16C and 16E in 2015 to 2017, where this region didn’t have weekend closures. The spawning ground acoustic survey is meant to provide a nightly estimate of spawning biomass among regions. It is analyzed in the same manner as the fishery-independent acoustic survey. The catches from the experimental nets are used to calibrate the spawning group specific target strength in order to obtain the nightly estimates of spawning biomass. 2024-02-15 Fisheries and Oceans Canada Francois.Turcotte@dfo-mpo.gc.ca Nature and EnvironmentScience and TechnologyECHO SOUNDERSAnchovies/HerringsPopulation DynamicsFisheriesTrawlClupea harengus harengusFisheries resourcesOceansGulf of St. Lawrence 4T Herring Spawning Grounds Biomass IndexCSV https://api-proxy.edh.azure.cloud.dfo-mpo.gc.ca/catalogue/records/5c79025c-5ebe-11ee-bd12-d17b9d44bf6a/attachments/fscpindex.csv 4T Herring Spawning Grounds Acoustic Surveys TransectsSHP https://api-proxy.edh.azure.cloud.dfo-mpo.gc.ca/catalogue/records/5c79025c-5ebe-11ee-bd12-d17b9d44bf6a/attachments/4T%20Spawning%20Grounds%20Acoustic%20Surveys.zip 4T Herring Spawning Grounds Acoustic Survey TransectsESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/NAFO_Fishing_Division_4T_Herring_Spawning_Grounds_Acoustic_Survey/MapServer 4T Herring Spawning Grounds Acoustic Survey TransectsESRI REST https://gisp.dfo-mpo.gc.ca/arcgis/rest/services/FGP/NAFO_Fishing_Division_4T_Herring_Spawning_Grounds_Acoustic_Survey/MapServer 4T Herring Spawning Grounds Acoustic Surveys - Data DictionaryCSV https://api-proxy.edh.azure.cloud.dfo-mpo.gc.ca/catalogue/records/5c79025c-5ebe-11ee-bd12-d17b9d44bf6a/attachments/data_dictionary.csv

In 2015, a spawning ground acoustic survey that follows the design of the fishery-independent acoustic survey was initiated. This survey is the result of a partnership between DFO and fishery associations. The survey design uses random parallel transects within predefined strata. Surveys are conducted by fishermen in the fall fishing season according to protocols developed by DFO. The survey is conducted at night, during the weekend fishery closures except in Herring fishing area 16C and 16E in 2015 to 2017, where this region didn’t have weekend closures. The spawning ground acoustic survey is meant to provide a nightly estimate of spawning biomass among regions. It is analyzed in the same manner as the fishery-independent acoustic survey. The catches from the experimental nets are used to calibrate the spawning group specific target strength in order to obtain the nightly estimates of spawning biomass.

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Contact Information

Delivery Point: 343 Université Ave

City: Moncton

Administrative Area: New Brunswick

Postal Code: E1C 5K4

Country: Canada

Electronic Mail Address: laurie.maynard@dfo-mpo.gc.ca

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