Details:

Personal Author:
Richards, Benjamin L.
Corporate Authors:
United States. National Marine Fisheries Service ; Pacific Islands Fisheries Science Center (U.S.)
United States. National Marine Fisheries Service ; Pacific Islands Fisheries Science Center (U.S.) Less -
NOAA Program & Office:
NMFS (National Marine Fisheries Service) ; PIFSC (Pacific Islands Fisheries Science Center)
NMFS (National Marine Fisheries Service) ; PIFSC (Pacific Islands Fisheries Science Center) Less -
Description:
The Bottomfish Fishery-Independent Survey in Hawai‘i (BFISH) is designed to provide estimates of population abundance and biomass of the main Hawaiian islands Deep 7 bottomfish complex that complement and enhance the stock assessment process at the Pacific Islands Fisheries Science Center (PIFSC). The 2018 BFISH survey, comprising 461 primary sampling units (PSU), was conducted from August to November at depths ranging from 75 to 400 m across the eight main Hawaiian Islands. Sampling operations included cooperative research fishing as well as the MOUSS camera system. Kalekale was most abundant, followed by ōpakapaka and ehu. Opakapaka had the highest exploited stock biomass followed by kalekale and ehu. Estimated biomass of ōpakapaka and onaga was approximately 1.529 and 0.422 million kg, respectively. Ehu stock biomass was about 0.654 million kg. Coefficients of variation (CV%) for exploited stock biomass ranged from 26.26 to 29.14 for ehu and ōpakapaka, the two main design species. To improve BFISH precision, future research will focus on (1) refining PSU classification with respect to habitat characteristics (e.g. seafloor hardness and complexity); (2) targeted allocation that better reflects the depth preferences of the design species; and (3) technological innovations that better define the unit sampled area.
Keywords:
[+]
Biomass
Estimates
Fish Populations
Fish Stock Assessment
Groundfishes

Series:
Administrative report H ; 20-01
DOI:
https://doi.org/10.25923/nmyh-7c59
Document Type:
Administrative Report
Place as Subject:
Hawaii ; Pacific Ocean
Hawaii ; Pacific Ocean Less -
Rights Information:
Public Domain
Compliance:
Submitted
Main Document Checksum:
[+]
urn:sha256:d48504b8de07373f64fde6ad218dcdc57a8f864770d833e8389d91804c63c342
File Type:

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