Jeff Shima
@drjeffshima.bsky.social
Professor of marine ecology at Victoria University of Wellington, New Zealand. Interested in population dynamics, larval biology, movement ecology, evolution of life histories, and otoliths. Lately fascinated by reef fish/myctophid interactions!
The team were fishing with a combination of IKMT, RMT, and MOCNESS—but I think most of the specimens pictured would have come out of the RMT.
November 29, 2024 at 4:43 AM
The team were fishing with a combination of IKMT, RMT, and MOCNESS—but I think most of the specimens pictured would have come out of the RMT.
I study fish movements!
November 28, 2024 at 6:55 PM
I study fish movements!
Hi Chris - I'm not sure, but I think there was a suggestion that it could have been an early life stage of the fangtooth, Anoplogaster cornuta. The team also captured the adults of this species in the nets.
November 27, 2024 at 9:38 PM
Hi Chris - I'm not sure, but I think there was a suggestion that it could have been an early life stage of the fangtooth, Anoplogaster cornuta. The team also captured the adults of this species in the nets.
Critters from the deep sea never cease to amaze me! They really are "textbook exemplars" of adaptation. Lanternfish are, of course, the coolest--but other critters are neat too! 🧵(3/3)
November 27, 2024 at 8:21 PM
Critters from the deep sea never cease to amaze me! They really are "textbook exemplars" of adaptation. Lanternfish are, of course, the coolest--but other critters are neat too! 🧵(3/3)
"The Great Migration" voyage (TAN2412) was an amazing success by any metric. Big thanks to Voyage Leader Amandine Sabadal, fish experts Andrew Stewart and Mike Miller, and all the other wonderful participants and crew! 🧵 (2/3)
November 27, 2024 at 8:21 PM
"The Great Migration" voyage (TAN2412) was an amazing success by any metric. Big thanks to Voyage Leader Amandine Sabadal, fish experts Andrew Stewart and Mike Miller, and all the other wonderful participants and crew! 🧵 (2/3)
Why do sixbars spawn on baby-killing new moons? Parents may trade-off offspring survival for offspring sex determination, to maximise production of their grandchildren! (6/6)
royalsocietypublishing.org/doi/epdf/10....
royalsocietypublishing.org/doi/epdf/10....
Lunar rhythms and their carry-over effects may shape environmental sex determination in a coral reef fish
royalsocietypublishing.org
August 7, 2024 at 11:22 PM
Why do sixbars spawn on baby-killing new moons? Parents may trade-off offspring survival for offspring sex determination, to maximise production of their grandchildren! (6/6)
royalsocietypublishing.org/doi/epdf/10....
royalsocietypublishing.org/doi/epdf/10....
This may be the first example of environmental sex determination driven by moonlight! Spawning patterns of sixbar adults closely resemble birthdates of males. Selection patterns suggest adults may spawn on new moons to make males, full moons to make females. Super cool! (5/6)
August 7, 2024 at 11:22 PM
This may be the first example of environmental sex determination driven by moonlight! Spawning patterns of sixbar adults closely resemble birthdates of males. Selection patterns suggest adults may spawn on new moons to make males, full moons to make females. Super cool! (5/6)
“What doesn’t kill you, makes you stronger”. Most sixbars born on a new moon will die. But for survivors, their developmental plasticity shapes future traits that position new moon babies at the top of a dominance hierarchy. (4/6)
August 7, 2024 at 11:21 PM
“What doesn’t kill you, makes you stronger”. Most sixbars born on a new moon will die. But for survivors, their developmental plasticity shapes future traits that position new moon babies at the top of a dominance hierarchy. (4/6)
Sex differentiation is environmentally sensitive and determined early in ontogeny for many wrasses, including sixbars. Socially dominant juveniles are more likely to mature as males. Males can potentially mate with many females to increase their fitness. (3/6)
August 7, 2024 at 11:20 PM
Sex differentiation is environmentally sensitive and determined early in ontogeny for many wrasses, including sixbars. Socially dominant juveniles are more likely to mature as males. Males can potentially mate with many females to increase their fitness. (3/6)
Why do sixbar wrasse spawn the most eggs at the new moon—a time that effectively kills more of their offspring? We suspect compensatory benefits later in life. We know offspring have developmental plasticity, and also that new moon birthdates benefit larval growth… (2/6)
August 7, 2024 at 11:20 PM
Why do sixbar wrasse spawn the most eggs at the new moon—a time that effectively kills more of their offspring? We suspect compensatory benefits later in life. We know offspring have developmental plasticity, and also that new moon birthdates benefit larval growth… (2/6)
Find out more here: tinyurl.com/utfba9em
November 3, 2023 at 2:17 AM
Find out more here: tinyurl.com/utfba9em
We hope to solve mesopelagic mysteries in this new collaboration with Steve Swearer, Alice Della Penna, Steve Wing, Suzie Mills, and Shaun Killen. Made possible by @marsdenfund.bsky.social . Find out more here! tinyurl.com/utfba9em and stay tuned for student opportunities!
November 3, 2023 at 2:13 AM
We hope to solve mesopelagic mysteries in this new collaboration with Steve Swearer, Alice Della Penna, Steve Wing, Suzie Mills, and Shaun Killen. Made possible by @marsdenfund.bsky.social . Find out more here! tinyurl.com/utfba9em and stay tuned for student opportunities!