Prolonged exposure to high carbon dioxide (acidified) seawater may corrode tooth-like scales (denticles) covering the skin of puffadder shysharks, a study in Scientific Reports suggests. As ocean CO2 concentrations increase due to human activity, oceans are becoming more acidic, with potential implications for marine wildlife. Although the effects of acidified water have been studied in […]
Author Archives: oceanicexplorer
While out on a seagrass monitoring boat trip with Parks Victoria on the Pelican1 recently, I caught up with acting Marine Science Program Manager Mark Rodrigue.
Mark talked about the new campaign Check Clean Dry that’s aimed at stopping the spread of marine pests such as North Pacific Seastars (Asterias amurensis), wakame (Undaria pinnatifida), Pacific Oyster (Crassostrea gigas) and some tidal and benthic habitat critters.
The seastars are the most concerning of all, popping up in previously undocumented areas in large numbers around Port Phillip Bay and Westernport near Melbourne, and across into South and East Gippsland at Wilsons Prom and Gippsland Lakes. Here’s a few I removed on a recent dive near my home at Frankston, a spot called Olivers Hill where I’ve previously never seen these seastars in any significant numbers. Recent sea surface temperature warming, a decline in their predators (the eleven armed seastar) or other factors may be at work here.
Mark spoke to Ross and John on local radio station 3AW this morning after some recent sightings of seastars near the mouth of the Maribyrnong River:
Old mate Jacko is part of a cartoon series created by Amellia Formby from the Wing Threads project for the Connected to Port Phillip initiative, which aims to tell the stories of the cultural heritage and amazing wildlife in and around Melbourne’s Port Phillip Bay.
Schools of Port Jackson sharks can often be found in marine protected areas in the bay such as Rickett’s Point, and in many protected rocky reef systems inside the bay and around the open beaches of the Mornington Peninsula. Safe to say, if you’ve never seen Jacko or his friends, then you need to get out diving more often!
Amellia will be demonstrating her great artworks at Day by the Bay Point Cook on Saturday March 23.
Along with my reduced frequency of blogging, it’s been hard to find time to get away in the past few years for warm water snorkeling and tropical beach trips. We last went to Port Douglas three years ago and finally made it back in August 2018 after a few aborted attempts to book in trips between house renovations, a wedding and other big events.
It’s hard to believe some people get to dive on the Great Barrier Reef every week (or the commercial dive boat crew, just about every day). Coming from a fairly cool winter where the water temperature was around 9 degrees Celsius, jumping in 24 degree water in a rash vest and shorts was an amazing relief. And the abundance of life on the GBR is well known but no Attenborough documentary prepares you for the variety of fish, coral, sponges, invertebrates… a truly incredible sight every time.
I was one of the lucky few on our Wavelength cruise that spotted a white tip reef shark (in the slideshow below), though most of the snorkelers seemed pretty inexperienced and happy to bob around the surface, far from the hiding spots of the sharks and rays.
Wavelength also regularly maintains a coral garden, where pieces of coral are grafted onto small cement blocks and grown until then can be transplanted onto new ground. A fellow uni graduate working on the boat was pretty enthusiastic about the potential of these coral gardens, though expanding the project to compensate for widespread coral bleaching is nearly impossible in today’s warming ocean (and political climate).
Fellow Deakin Warrnambool marine biology graduate Nicole Nash has had, by the sounds of it, a pretty envious post-university career so far – ranger with Queensland Parks and Wildlife and founder of a campaign to end single-use plastics by tourist boats known as The Last Straw on the Great Barrier Reef.
Plastic straws are one of those absurd plastic implements people may use on a daily, once-off basis, throw away and then forget about – think plastic-handled cotton earbuds, cheap disposable razors.
While there are bamboo and steel straws on the market, like reusable coffee cups they rely on the user having the forethought to take them in their bag to a cafe, restaurant or bar. I have several reusable coffee cups and can count on one hand the time I’ve used a single-use plastic cup in the past year (always because I was caught out with no alternative).
Nicole is having some success convincing tourist boat operators to ditch plastic straws and has the backing of Tangaroa Blue and other partners to produce this video and push the message further. Well done!
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While I can’t make it to IMCC5 this June, opening up the conference to non-academics is a great idea and wish more marine science conferences offered the same opportunity
By Chelsea Gray
Everyone loves the sea. Each year, millions of people all over the world flock to sandy beaches. When digging toes into the warm sand, listening to the waves crash over the ocean, how may people feel connected to the ocean? And how many people take that connection home with them, often far from the coast, and impossibly far from the open sea?
Our connection to the sea, no matter how far inland we may live, runs deep. Snow from the mountain tops melts, running off our roads and lawns into rivers, before eventually emptying out to the sea. With much of that run off comes pollutants, chemicals from our pesticides and sediment from agriculture. These pollutants threaten our health and fisheries, as cans of tuna line grocery store shelves.
The ocean has the power to transfix us; It lets us realize our deep connections to nature through…
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This is where I find my serenity. Some day’s I long to see the beach and ocean so much. A lot of great memories, and happy times. But like everything in life, one moves on. https://dailypost.wordpress.com/photo-challenges/serene/
Heading back to Warrnambool for a work trip this week and taking a few days off to make it a long weekend. After three years away from this place it’s still tough to go back and see the kind of places we used to enjoy regularly – the breakwater, Middle Island (home of the penguin colony featured in the Oddball movie) and the beaches less than 10 minutes from town but so often seemingly isolated from the rest of the world. These beaches also used to be hotspots for four-wheel-driving but better enforcement and protection of bird nesting sites has meant that wheel tracks are thankfully harder to find.
A couple of days ago I was loaned the new Nikon camera, the D500, from Nikon Australia. It is Nikons new…
As a resident of the often-maligned state of Victoria since 2001 (apart from two years in the UK), I’ve spent enough time in Melbourne city to have seen postcard-worthy sunsets over the river on a regular basis. Though I’m not a real city lover, the past four months have been spent working in a 30-storey building that has great views of the MCG, Melbourne Tennis Centre, Yarra River and Port Phillip Bay. And not being able to get out in the water as much as I’d like is tempered somewhat by looking out at the bay or river and soaking up those amazing views.
22nd edition of Marine Life monthly post. Marine Life post published every 19th of the month. It aims to share information on marine life species and to promote their conservation. The Nurse sharks are a common sight when scuba diving in Ambergris Caye (Belize). They usually swim in a group and a chance to meet two […]