noaa-fisheries-afsc-data-socrata/afscabl-embryonic-development-of-quillback-cvnb-yj5u

  • 002
  • alaska
  • baranof island
  • biota
  • cross sound
  • + 8

AFSC/ABL: Embryonic development of quillback rockfish

AFSC/ABL: Embryonic development of quillback rockfish

Maternal effects on the quality of progeny can have direct impacts on population productivity. Rockfish are viviparous and the oil globule size of larvae at parturition has been shown to have direct effects on time until starvation and growth rate. We sampled embryos and preparturition larvae opportunistically from 89 gravid quillback rockfish (Sebastes maliger) in Southeast Alaska. Because the developmental stage and sampling period were correlated with oil globule size, they were treated as covariates in an analysis of maternal age, length, and weight effects on oil globule size. Maternal factors were related to developmental timing for almost all sampling periods, indicating that older, longer, and heavier females develop embryos earlier than younger, shorter, or lighter ones. Oil globule diameter and maternal length and weight were statistically linked, but the relationships may not be biologically significant. Weight-specific fecundity did not increase with maternal size or age, suggesting that reproductive output does not increase more quickly as fish age and grow. Age or size truncation of a rockfish population, in which timing of parturition is related to age and size, could result in a shorter parturition season. This shortening of the parturition season could make the population vulnerable to f luctuating environmental conditions.

Columns

NameSocrata field nameColumn name in sgr mountData typeDescription
AgeageageNumber
stagestagestageNumber
notenotenoteText
datedatedateCalendar date
heart beatheart_beatheart_beatText
otootootoText
swimmingswimmingswimmingText
gutgutgutText
OG diamog_diamog_diamNumber
Length (cm)length_cmlength_cmNumber
weight (g)weight_gweight_gNumber
mouthmouthmouthText
earlier stagesearlier_stagesearlier_stagesText
samplesamplesampleNumber
fecunduityfecunduityfecunduityNumber
std OG diamstd_og_diamstd_og_diamNumber
yellow pigyellow_pigyellow_pigText
sample IDsample_idsample_idNumber
eyeeyeeyeText
CVcvcvNumber
ovary weightovary_weightovary_weightNumber
yearyearyearNumber
pigmentpigmentpigmentText

Upstream Metadata