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Back in Perth!
Valessan
ozraptor4
Woohoo!

My stint at Museum Victoria, Melbourne has come to a close after four glorious years! In that time I've described/helped to describe a half-dozen or so new fossil fish and had more fun than I can remember. But all good things must come to an end so I'm currently recuperating back in Perth, in limbo as I await for the removalists to deliver all my material possessions from over east. Will tell you more when I kickstart my brain!

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welcome back :)

Did you want your golden barbs back? there's two of the descendants left...

also, toying with the idea of a post about Bothriolepis - anything I should know? and what advantage is there in spawning at sea?

Glad to see the fish still live! Had to leave all my friends (including the python and Saratoga) back in Melbourne. Alas, will not be in Perth (or this hemisphere for that matter) for much longer - will hopefully have a 2 yr position in Beijing at the end of the year.

As for Bothriolepis spawning at sea - well be advised that we don't really know much about Bothrio reproduction - whether they even spawned in the first place (Ptyctodonts, phyllolepids and arthrodires are now known to be internally fertilizing livebearers - dunno about antiarchs, but I suspect that they did the same). Given that Bothrio encompasses 150+ spp. in a wide variety of habitats (tropical marine reefs, coastal lagoons, estuaries, freshwater streams, landlocked lakes etc.), members of the genus probably also invested in different breeding strategies. Certainly the Gogo Bothrio is a fully marine species with both juvies and adults represented. Some freshwater forms may well have been anadromous - benefits in juvenile disperal, growing in a more stable osmotic environment or taking advantage of a marine food source unavailable in fw? Who knows?

Re: Bothriolepis

Hmm, the osmotic benefit didn't occur to me - good point! the converse - spawning up-river - certainly would have made sense back when there was nothing in land to eat you, but non-euryhaline fingerlings certainly would prefer the ocean even with m,ore chance of a toothy death, wouldn't they?

Also it should be noted that there are at 12-15+ spp. of Bothrio in the freshwater (fluvial-lacustrine) Mid-Devonian (Givetian) Aztec Siltstone of Antarctica - seem to have produced a rift-lake cichlid-esque species flock - and suggests that (like cichlids) they lacked a dispersive larval stage (limited dispersal of juvies leading isolation and speciation within a single freshwater system).

All my refs are currently in transit from Melbourne... will give you citations when they arrive.

Glad that you enjoyed your time - and achieved so much - in the Barony of Stormhold!

Back in the DoubleYyou Ayyyy

Welcome back.

How long before you leave our shores?

Re: Back in the DoubleYyou Ayyyy

Probably Dec-Jan at this rate.

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