AFSC/ABL: Female Giant Grenadier maturity

Metadata Updated: February 4, 2017

Giant grenadiers Albatrossia pectoralis are caught as bycatch in deep-sea commercial fisheries in relatively large numbers. The population appears to be stable, although there is no directed fishery, catch limits, or reporting requirements. The purpose of our study was to describe and quantify the reproductive life history characteristics and natural mortality of female giant grenadiers. During the summers of 2004 and 2006, a total of 338 specimens were collected from the Gulf of Alaska. Every phase of reproductive development was found, suggesting a protracted annual spawning season. An ovarian wall thickness technique was used to successfully place 31% (n 24) of the fish with an unknown maturity status into a known category. Female age at 50% maturity was 22.9 years, and preanal fin length at 50% maturity was 26 cm. Total fecundity ranged from 35,000 to 231,000 oocytes (mean106,761), with a mean mature oocyte diameter of 1.26 mm. We developed a new technique for preparing otoliths for age determination by grinding off the distal surface to elucidate the growth zones; age ranged from 14 to 58 years. Estimates of natural female mortality ranged from 0.052 to 0.079 and estimates of total female mortality from 0.061 to 0.149. This life history information will be essential for future management of giant grenadier populations in the North Pacific Ocean.

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Metadata Date May 5, 2016
Metadata Created Date May 31, 2016
Metadata Updated Date February 4, 2017
Reference Date(s) (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date May 5, 2016
Metadata Created Date May 31, 2016
Metadata Updated Date February 4, 2017
Reference Date(s) (publication)
Responsible Party Alaska Fisheries Science Center (Point of Contact)
Contact Email
Access Constraints Access Constraints: Contact the Point of Contact for data request form. | Use Constraints: User must read and fully comprehend the metadata prior to use. Data should not be used beyond the limits of the source scale. Acknowledgement of NOAA, as the source from which these data were obtained, in any publications and/or other representations of these data is suggested.
Bbox East Long -133
Bbox North Lat 59.5
Bbox South Lat 54
Bbox West Long -151
Coupled Resource
Frequency Of Update notPlanned
Guid gov.noaa.nmfs.inport:17227
Harvest Object Id 9c70d93a-7026-4643-8a55-70aba32e3466
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Metadata Language eng
Metadata Type geospatial
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2006
Temporal Extent End 2008

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