Abstract
Live-bearing fish start hunting for mobile prey within hours after
birth, an example of extreme precociality. Because prenatal, in
utero, development of this behaviour is constrained by the lack of
free-swimming sensory-motor interactions, immediate success
after birth depends on innate, evolutionary acquired patterns.
Optimal performance however requires flexible adjustment to an
unpredictable environment. To distinguish innate from postnatally
acquired patterns we analyzed over 2000 prey capture events for 28
Metallic livebearers (Girardinus metallicus; Poeciliidae), during
their first three days after birth. We show that the use of synchronous
pectoral fin beats for final acceleration and ingestion is truly innate. It allows for direct control while avoiding head yaw, supporting
immediate success. Rapid development of eye movements and
body curvatures, however, show that eye-tail coordination requires
postnatal learning and calibration. The combination of innate motor
programs and rapid, postnatal development reveal how superprecocial
animals optimize survival into adulthood.
birth, an example of extreme precociality. Because prenatal, in
utero, development of this behaviour is constrained by the lack of
free-swimming sensory-motor interactions, immediate success
after birth depends on innate, evolutionary acquired patterns.
Optimal performance however requires flexible adjustment to an
unpredictable environment. To distinguish innate from postnatally
acquired patterns we analyzed over 2000 prey capture events for 28
Metallic livebearers (Girardinus metallicus; Poeciliidae), during
their first three days after birth. We show that the use of synchronous
pectoral fin beats for final acceleration and ingestion is truly innate. It allows for direct control while avoiding head yaw, supporting
immediate success. Rapid development of eye movements and
body curvatures, however, show that eye-tail coordination requires
postnatal learning and calibration. The combination of innate motor
programs and rapid, postnatal development reveal how superprecocial
animals optimize survival into adulthood.
| Original language | English |
|---|---|
| Title of host publication | Sun, sea & science |
| Subtitle of host publication | Abstract book SEB Brighton 2016: 4-7 July, 2016 Brighton Centre, UK |
| Publisher | Society for Experimental Biology |
| Pages | 44-44 |
| Publication status | Published - 2016 |
| Event | Society for Experimental Biology (SEB) 2016 - SEB 2016, Brighton, United Kingdom Duration: 4 Jul 2016 → 7 Jul 2016 |
Conference
| Conference | Society for Experimental Biology (SEB) 2016 |
|---|---|
| Country | United Kingdom |
| City | Brighton |
| Period | 4/07/16 → 7/07/16 |